EP0914869B1 - Buse à caractéristiques de pulvérisation constantes dans une grande plage de dimensions - Google Patents

Buse à caractéristiques de pulvérisation constantes dans une grande plage de dimensions Download PDF

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Publication number
EP0914869B1
EP0914869B1 EP98120050A EP98120050A EP0914869B1 EP 0914869 B1 EP0914869 B1 EP 0914869B1 EP 98120050 A EP98120050 A EP 98120050A EP 98120050 A EP98120050 A EP 98120050A EP 0914869 B1 EP0914869 B1 EP 0914869B1
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EP
European Patent Office
Prior art keywords
gap
nozzle
liquid
mouth
spray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98120050A
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German (de)
English (en)
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EP0914869A2 (fr
EP0914869A3 (fr
Inventor
Herbert Dr. h.c. Hüttlin
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HUETTLIN, HERBERT, DR. H.C.
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Individual
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Publication of EP0914869A2 publication Critical patent/EP0914869A2/fr
Publication of EP0914869A3 publication Critical patent/EP0914869A3/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/065—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet an inner gas outlet being surrounded by an annular adjacent liquid outlet

Definitions

  • the invention relates to a multi-component atomizing nozzle with at least three concentric, each with a slit-shaped mouth opening leading flow channels, with a mouth gap for spraying a liquid on both sides of one Mouth gap is surrounded for the escape of a gas.
  • Such an atomizing nozzle is known from DE-PS 857 924.
  • this atomizing nozzle there are annular flow channels provided by several concentrically nested Pipes are formed. Taper in the area of the mouth opening the flow channels radially inward.
  • a flow channel for spraying a liquid is on both sides surrounded by channels for the passage of air.
  • a widely used area of application for a multi-component atomizing nozzle according to the present application in being a particulate good with the liquid to be sprayed to treat.
  • a treatment process consists, for example, of a particulate one Easy to granulate.
  • the goal is to fine fine particles agglomerate larger particles.
  • An area of application for such Granules is the pharmaceutical industry in which almost dust-fine particles to more manageable granulate particles should be agglomerated.
  • the sprayed liquid in another area of application, namely coating, the sprayed liquid a superficial coating on the form coating material.
  • nozzle assemblies have proven to be advantageous proven, as known for example from DE 41 10 127 A1 are.
  • Linear gap channels are provided there.
  • both sides a central outlet channel for the liquid are slit-shaped Mouth openings are provided for a gaseous medium.
  • a specially conditioned gas flow around the Spray mist is guided around, for which the technical term "Microclimate” has established. This microclimate ensures, for example, that the spray does not dry prematurely, undesirable warmed or cooled (e.g. hot-melt coating), but in the consistency required on a case-by-case basis It hits well.
  • These nozzles are tubular and have a central one cylindrical channel with a circular outlet opening for the liquid on.
  • This central channel is from surrounded by an annular channel through which the spray air is led that is, the central cylindrical beam is ring-shaped surrounds, which then results in a conical spray.
  • Such specific operating variables are, for example, the gap width and the length of the gap through which the liquid and the Escaping gas flows.
  • the operating parameters of pressure and throughput can be varied with a specific nozzle size.
  • scaling-up i.e. when one of an apparatus of a certain size, which with a certain number of nozzles of a certain size is transferred to larger apparatus.
  • the swirled good hovers near the Mouth openings of the nozzles or just above, so that long "Wet" flames or tongues to wet the patient to be treated Good results in the area of the nozzle and no uniform treatment can be achieved in the entire fluidized bed.
  • nozzles of a certain structural size and one certain construction when scaling up in larger numbers used to increase the throughput accordingly to achieve spraying liquid are provided.
  • the object is achieved in that the gap width of the mouth gap for spraying the liquid the mouth opening is in the range of 0.2 mm to 2.2 mm that the gap width of the mouth gap for the exit of the gases at the Mouth opening is in each case in the range from 0.3 mm to 2.3 mm, and that the ratio between the gap width of the orifice gap for spraying the liquid and the extensive Gap length of this gap in the range from 1:50 to 1: 5,000 lies.
  • the gap width can range from 0.2 mm to 2.2 mm can be varied, with wider gaps while remaining the same Spray characteristics allow larger throughputs. It is necessary, because, for example, larger equipment has to be supplied, pumping even more liquid per unit time through the nozzle, so a larger diameter nozzle can be provided, ie with a larger gap length, but the gap width is still in the range of 0.2 mm to 2.2 mm.
  • spray characteristics means that even with a much larger one Nozzle with higher throughput rates constant spray mist conditions can be achieved like with a much smaller nozzle, thus a good that is swirled through this area, so just as evenly and with about the same amount per Volume or area unit with the liquid to be sprayed is applied.
  • This spray characteristic remains in the Ratio range of gap width to gap length from 1:50 to 1: 5,000 received.
  • the gap width is of the mouth gap for spraying the liquid in the Range from 0.8 mm to 1.6 mm.
  • the gap width is of the mouth gap for spraying the liquid about 1.2 mm.
  • the gap width is of the mouth gaps for the gas to exit on both sides of the Gap for spraying the liquid in the range of 0.9 mm up to 1.9 mm.
  • Treatment methods include scaling up in large steps Maintaining a very constant spray characteristic.
  • This gap width has changed in the previously mentioned areas of granulating, drying and coating, especially in the pharmaceutical industry, as an optimal value turns out which is a very large-scale scaling-up with consistently excellent Spray characteristic enables.
  • the gap width of the mouth gap of these further concentric flow channels in the area of Mouth opening in the range from 0.5 mm to 3.5 mm.
  • This selection range also enables nozzles with a conditioning "microclimate", a scaling-up with constant spray characteristics.
  • This retention of a very specific spray characteristic with conditioning microclimate is especially in gap widths the other concentric flow channels in the area from 2.0 to 3.0 mm and in particular with gap widths of approximately 2.5 mm achieved.
  • the invention is independent of whether it is strict annular flow channels, oval or elliptical flow channels is acting, whether they are continuously ring-shaped or only spray over partial areas, and is also independent of whether the spray direction is exactly along the flow channel axis runs or directed out of this. Because it was through intensive research found that even with different Constructions as described below in compliance with the gap width and gap length parameters consistently good treatment results with a scaling-up can be achieved.
  • a multi-substance atomizing nozzle shown in FIGS. 1 and 2 is provided with the reference number 10 in its entirety.
  • the nozzle 10 consists of four coaxially pushed tubes 12, 14, 16 and 18.
  • the two outer tubes 16 and 18 are at the inflow end provided with widenings, so that here non-specified inflow chambers are formed, the via connecting pieces 20 and 22 with through the nozzle 10 spraying media are supplied.
  • a channel 24 which, as in the enlarged 2 clearly visible, in an annular mouth gap 30 in the region of the mouth opening the nozzle 10 opens.
  • the inner channel 24 and the outer channel 28 are over the connecting piece 22 with a gaseous medium called Spray air SL supplies, like that in particular from the sectional view 1 can be seen.
  • the middle channel 26 is connected to the connecting piece 20 with the to be sprayed liquid SF supplied.
  • the two media are spray air SL and spray liquid SF conveyed through the nozzle 10, so passes through the mouth gap 32 the liquid that flows through the both sides of the Mouth gaps 30 and 34 spray air emerging to a fine Mist is sprayed, as indicated by the arrows in Fig. 1 is.
  • the innermost tube 12 is closed by a plug 36, so that a spray cone ring is created as he is indicated in Fig. 1 by the dashed lines.
  • This spray cone now has a very specific characteristic, i.e. the finely sprayed liquid particles move with a certain characteristic, i.e. in a certain Direction and a specific density distribution from the nozzle mouth path.
  • a larger amount of liquid is now to be conveyed through a nozzle 10 be so it is not possible to use the spray liquid with an arbitrarily higher pressure and thus with a higher To promote throughput through channel 26, because then a Relatively long "wet" tongue or flame on spray liquid escaping SF arise before, if at all, through the spray air can be sprayed into a mist.
  • a "wet" tongue take up a length of several centimeters can, but in the centimeter range in front of the nozzle mouth the goods to be treated already existed, none would uniform treatment result can be achieved, yes not at all with the desired spray characteristics.
  • a nozzle 50 is now shown, which also consists of four nested tubes 52, 54, 56 and 58 constructed accordingly, corresponding result at the mouth of the nozzle 50 Muzzle splits 60, 62 and 64.
  • the diameter and the Materials of the tubes 52, 54, 56 and 58 is now chosen so that the gap width 72 of the mouth gap 62 through which the liquid occurs, approximately the gap width 42 of the mouth gap 32 corresponds to the nozzle 10.
  • the gap widths are the same 70 and 74 of the mouth gaps 60 and 64 of the nozzle 50 approximately same as the gap widths 40 and 44 of the mouth gaps 30 and 34 of the nozzle 10, ie the areas through which the spray air exits.
  • the nozzle 50 has a larger diameter changes not as long as you look in the dimensioning rules of the relationship between the gap width 42 or 72 and the circumferential gap length remains between 1:50 and 1: 5,000.
  • FIG. 4 and 5 is another embodiment of a nozzle 80, which consists of six tubes 82 pushed into one another, 84, 86, 88, 90 and 92 is constructed.
  • a nozzle 80 which consists of six tubes 82 pushed into one another, 84, 86, 88, 90 and 92 is constructed.
  • In the area of the mouth end are six molded on tubes 82, 84, 86, 88, 90 and 92 Rings 94, 96, 98, 100, 102 and 104 put on, which ensure that the channels created between the pipes in the area the mouth opening from the central longitudinal axis 130 of the nozzle 80 be deflected sideways out.
  • the mouth gap 114 which formed between the ring 98 and 100 has a gap width 124 through this gap the liquid is sprayed.
  • the mouth gap 114 On both sides of the mouth gap 114 are two ring-shaped mouth gaps 112, 116 present between the rings 100, 102 or 96 and 98 are formed and their gap widths 122 and 126 are identical and slightly larger than the gap width 124.
  • the spray air escaping through the mouth gaps 112 and 116 atomizes the liquid emerging through the orifice 114 to a fine spray 131, as indicated in Fig. 4 and which is laterally directed out of the central longitudinal axis 130 is.
  • microclimate 133 ensures that the spray 131st is around and conditioned accordingly, like which is indicated in Fig. 4 by the arrows.
  • the microclimate 133 ensures, for example, that the media of the spray 131 do not cool down too quickly, so they are affected by the microclimate kept at temperature.
  • the gap widths 128 and 120 the mouth gaps 110 and 118 are slightly larger than the gap widths the other muzzle.
  • the gap width 124 is approximately 1.2 mm, the gap widths 122 and 126 about 1.3 mm and the gap widths 120 and 128 about 2.5 mm.
  • the circumferential gap length of the gap 114 through which the spray liquid occurs is about 408 mm, so a ratio between gap width 124 and gap length in the range of 1: 340 is present.
  • the stopper closes 142 not the inner channel surrounded by the inner tube 82 completely, so that even through the interior of the nozzle 80 a medium can pass through, for example process air or a mixture from process air and a solid, which additionally through the nozzle 80 is to be sprayed.

Landscapes

  • Nozzles (AREA)
  • Gas Separation By Absorption (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Air Bags (AREA)
  • Treating Waste Gases (AREA)

Claims (8)

  1. Buse d'atomisation de plusieurs composants, comprenant au moins trois canaux d'écoulement (24, 26, 28) concentriques, menant chacun à une bouche en forme de fente, une fente formant bouche (32, 62, 114), destinée à pulvériser un liquide (SF) étant entourée, de part et d'autre, par une fente formant bouche (30, 34 ; 60, 64 ; 112, 116) destinée à la sortie d'un gaz (SL), caractérisée en ce que la largeur (42, 72, 124) de la fente formant bouche qui est destinée à pulvériser le liquide est comprise, au niveau de la bouche, entre 0,2 mm et 2,2 mm, en ce que la largeur (40, 44 ; 70, 74 ; 122, 126) des fentes formant bouches (30, 34 ; 60, 64 ; 112, 116) destinées à la sortie des gaz est comprise, au niveau de la bouche, entre 0,3 mm et 2,3 mm, et en ce que le rapport entre la largeur (42, 72, 124) de la fente formant bouche destinée à pulvériser le liquide (SL), et la longueur du périmètre de cette fente est compris entre 1 : 50 et 1 : 5000.
  2. Buse d'atomisation de plusieurs composants selon la revendication 1, caractérisée en ce que la largeur (42, 72, 124) de la fente formant bouche destinée à pulvériser le liquide (SF) est comprise entre 0,8 mm et 1,6 mm.
  3. Buse d'atomisation de plusieurs composants selon la revendication 1 ou 2, caractérisée en ce que la largeur (42, 72, 124) de la fente formant bouche destinée à pulvériser le liquide (SF) est d'approximativement 1,2 mm.
  4. Buse d'atomisation de plusieurs composants selon l'une des revendications 1 à 3, caractérisée en ce que la largeur (40, 44 ; 70, 74 ; 122, 126) des fentes formant bouches destinées à la sortie du gaz (SL), de part et d'autre de la fente destinée à pulvériser le liquide, est comprise entre 0,9 mm et 1,9 mm.
  5. Buse d'atomisation de plusieurs composants selon l'une des revendications 1 à 4, caractérisée en ce que la largeur (40, 44 ; 70, 74 ; 122, 126) des fentes formant bouches destinées à la sortie du gaz (SL), de part et d'autre de la fente destinée à pulvériser le liquide, est d'approximativement 1,3 mm.
  6. Buse d'atomisation de plusieurs composants selon l'une des revendications 1 à 5, caractérisée en ce que sont prévus d'autres canaux d'écoulement concentriques, disposés radialement à l'intérieur et/ou radialement à l'extérieur des canaux d'écoulement concentriques qui sont au moins au nombre de trois, la largeur (120, 128) de la fente formant bouche (110, 118) de ces autres canaux d'écoulement concentriques étant comprise, au niveau de la bouche, entre 0,5 mm et 3,5 mm.
  7. Buse d'atomisation de plusieurs composants selon la revendication 6, caractérisée en ce que la largeur (120, 128) des autres canaux d'écoulement concentriques est comprise entre 2,0 mm et 3,0 mm.
  8. Buse d'atomisation de plusieurs composants selon la revendication 6 ou 7, caractérisée en ce que la largeur (120, 128) des autres canaux d'écoulement concentriques est d'approximativement 2,5 mm.
EP98120050A 1997-11-06 1998-10-23 Buse à caractéristiques de pulvérisation constantes dans une grande plage de dimensions Expired - Lifetime EP0914869B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19749072 1997-11-06
DE19749072A DE19749072C1 (de) 1997-11-06 1997-11-06 Mehrstoffzerstäuberdüse

Publications (3)

Publication Number Publication Date
EP0914869A2 EP0914869A2 (fr) 1999-05-12
EP0914869A3 EP0914869A3 (fr) 2000-12-27
EP0914869B1 true EP0914869B1 (fr) 2004-01-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120050A Expired - Lifetime EP0914869B1 (fr) 1997-11-06 1998-10-23 Buse à caractéristiques de pulvérisation constantes dans une grande plage de dimensions

Country Status (5)

Country Link
US (1) US6045061A (fr)
EP (1) EP0914869B1 (fr)
AT (1) ATE257410T1 (fr)
DE (2) DE19749072C1 (fr)
ES (1) ES2212197T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10345342A1 (de) * 2003-09-19 2005-04-28 Engelhard Arzneimittel Gmbh Verfahren zur Herstellung eines lagerstabilen Extraktes aus Efeublättern, sowie ein nach diesem Verfahren hergestellter Extrakt
DE102004029029B4 (de) * 2004-06-09 2018-12-13 Deutsches Zentrum für Luft- und Raumfahrt e.V. Einspritzkopf
CA2632092C (fr) * 2005-11-29 2013-01-08 Bete Fog Nozzle, Inc. Buses de pulverisation
DE102006019890B4 (de) 2006-04-28 2008-10-16 Dürr Systems GmbH Zerstäuber und zugehöriges Betriebsverfahren
DE102007013628A1 (de) * 2007-03-19 2008-09-25 Wurz, Dieter, Prof. Dr.-Ing. Rücklaufdüsen mit Druckluftunterstützung
DE102010014580A1 (de) * 2010-04-09 2011-10-13 Dieter Wurz Mehrstoffdüse mit Primärgaskernstrahl
JP6033800B2 (ja) * 2011-03-07 2016-11-30 スネクマ ３部同軸構造を有する少なくとも１つの噴射要素を備えている２つの推進剤の混合用のインジェクタ
FR3009688B1 (fr) * 2013-08-13 2017-03-03 Sames Tech Pulverisateur d'un produit de revetement liquide et installation de pulverisation comprenant un tel pulverisateur

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
DE273511C (fr) *
US1713529A (en) * 1925-11-10 1929-05-21 Grant Caroline Lilian Wales Garden trowel
DE857924C (de) * 1949-06-03 1952-12-04 Emil Dr-Ing Kirschbaum Zerstaeubungsduese
US3084874A (en) * 1959-08-12 1963-04-09 Aeroprojects Inc Method and apparatus for generating aerosols
US5845846A (en) * 1969-12-17 1998-12-08 Fujisaki Electric Co., Ltd. Spraying nozzle and method for ejecting liquid as fine particles
DE2121066C3 (de) * 1971-04-29 1974-05-30 Knapsack Ag, 5033 Huerth-Knapsack Zerstäubungsdüse für einen Zerstäubungstrockner
DE2757522C2 (de) * 1977-12-23 1979-11-22 Behr, Hans, 7000 Stuttgart Rund- oder Ringstrahldüse zum Erzeugen und Abstrahlen eines Nebels oder Aerosols zur Beschichtung von Gegenständen
SE8202066L (sv) * 1982-03-31 1983-10-01 Boliden Ab Atomiseringsforfarande och -anordning
DE3806537A1 (de) 1988-03-01 1989-09-14 Herbert Huettlin Duesenbaugruppe fuer apparaturen zum granulieren, pelletieren und/oder dragieren
DE4110127A1 (de) 1991-03-27 1992-10-01 Herbert Huettlin Duesenbaugruppe zum verspruehen von fluessigkeiten
US5505045A (en) * 1992-11-09 1996-04-09 Fuel Systems Textron, Inc. Fuel injector assembly with first and second fuel injectors and inner, outer, and intermediate air discharge chambers

Also Published As

Publication number Publication date
EP0914869A2 (fr) 1999-05-12
ES2212197T3 (es) 2004-07-16
US6045061A (en) 2000-04-04
DE19749072C1 (de) 1999-06-10
DE59810539D1 (de) 2004-02-12
EP0914869A3 (fr) 2000-12-27
ATE257410T1 (de) 2004-01-15

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