WO2001053191A2 - Nozzle device in a dissolving apparatus for dissolving a solid in a solvent - Google Patents

Nozzle device in a dissolving apparatus for dissolving a solid in a solvent Download PDF

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Publication number
WO2001053191A2
WO2001053191A2 PCT/EP2001/000486 EP0100486W WO0153191A2 WO 2001053191 A2 WO2001053191 A2 WO 2001053191A2 EP 0100486 W EP0100486 W EP 0100486W WO 0153191 A2 WO0153191 A2 WO 0153191A2
Authority
WO
WIPO (PCT)
Prior art keywords
mixing tank
nozzle
annular gap
dissolving
solid
Prior art date
Application number
PCT/EP2001/000486
Other languages
German (de)
French (fr)
Other versions
WO2001053191A3 (en
Inventor
Kristina BÖE
Raimund Kalinowski
Thomas Herold
Original Assignee
Tuchenhagen Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tuchenhagen Gmbh filed Critical Tuchenhagen Gmbh
Priority to EP01909639A priority Critical patent/EP1248743B1/en
Priority to JP2001553207A priority patent/JP2003520129A/en
Priority to AT01909639T priority patent/ATE254576T1/en
Priority to DE50100992T priority patent/DE50100992D1/en
Publication of WO2001053191A2 publication Critical patent/WO2001053191A2/en
Publication of WO2001053191A3 publication Critical patent/WO2001053191A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • B01F21/20—Dissolving using flow mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/912—Radial flow
    • B01F2025/9121—Radial flow from the center to the circumference, i.e. centrifugal flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/913—Vortex flow, i.e. flow spiraling in a tangential direction and moving in an axial direction

Definitions

  • the invention relates to a nozzle device in a dissolving apparatus for dissolving a solid in a solvent, preferably a powdery solid in water, according to the preamble of claim 1.
  • the object of the invention is to shorten the dissolving time in a mixing tank compared to known dissolving devices of the generic type and to simplify the apparatus itself.
  • the suspension is not supplied to the mixing tank via its jacket part, but rather via its bottom part.
  • a nozzle device is provided which, starting from a feed pipe and viewed in the direction of flow, branches into an annular gap nozzle and a pipe nozzle.
  • the annular gap nozzle generates an annular gap flow which is oriented essentially transversely to the longitudinal axis of the mixing tank.
  • the remaining partial flow of the supplied suspension is discharged via a tubular nozzle, which generates a driving flow in the mixing tank, which, with respect to the longitudinal axis of the mixing tank, has an axial and additionally a tangential directional component oriented towards the head part.
  • a convection flow is generated in the mixing tank via the tubular nozzle, which covers the entire tank content there and circulates it both in the vertical and in the tangential direction.
  • the one about the ring The other partial flow of the suspension, which is discharged through the gap nozzle, crosses the preferably downward convection flow and, on the one hand, leads to intensive mixing of the suspension and, on the other hand, this very high-energy cross-flow favors the suspension conditions the convection flow and the annular gap flow inevitably the convection flow therefore includes the entire tank content as planned in the mixing and dissolving process, stagnant areas in the tank with less favorable mass transfer conditions are thereby reliably avoided
  • annular gap nozzle it has proven to be advantageous to design the annular gap nozzle in such a way that it extends over an application angle of approximately 360 degrees, measured in a plane perpendicular to the longitudinal axis of the mixing tank. This measure enables and can discharge the annular gap flow over the entire cross-sectional area of the mixing tank thereby intersect with the convection flow flowing down over the entire circumference of the cylindrical jacket of the mixing tank.
  • the proposed nozzle device is advantageously simplified if, as is also proposed, the feed pipe of the nozzle device is passed through an outlet housing serving to remove the suspension from the bottom part. In this case, only a single opening in the bottom part of the mixing tank is required
  • the feed pipe is arranged coaxially to the longitudinal axis of the mixing tank in the base part, the arrangement is simplified on the one hand, on the other hand, the largely axially symmetrical characteristics of the flow pattern in the mixing tank result in particularly favorable dissolving and suspending conditions
  • the dissolving and suspending conditions are further decisively improved if the solid to be suspended and dissolved is not fed directly to the mixing tank, but rather to the suspension pumped around in the circuit outside the mixing tank.
  • a feed device for the solid into a between the Drain housing and a circulation pump provided suction line
  • FIG. 1 shows a longitudinal section through a schematic illustration
  • Figure 2 shows an enlarged view of a longitudinal section through that part of
  • Nozzle device which is identified by the detail “X” in FIG. 1 and FIG. 2a shows a plan view of the nozzle device according to FIG. 2 REFERENCE SIGN LIST OF ABBREVIATIONS USED
  • the opening apparatus ( Figure 1) consists essentially of a mixing tank 1, with a bottom part 1 a, a cylindrical jacket part 1 b and a head part 1 c, a housing 2 flanged to the bottom part 1 a, which consists of a drain housing 2 b and an inlet housing arranged underneath 2a, and a circuit line 6 starting from the outlet housing 2b and opening into the inlet housing 2a.
  • the latter consists of a suction line 6a, which connects the outlet housing 2b to a circulation pump 5, and a pressure line 6b, which leads from the circulation pump 5 to the inlet housing 2a.
  • a feed device 4 for a solid F opens into the suction line 6a.
  • a nozzle device 3 penetrates the outlet housing 2b in order to engage in the bottom region of the mixing tank 1 via a bottom opening 1d in the bottom part 1a.
  • the nozzle device 3 consists of a feed pipe 3a (see also FIG. 2), which is between one of the inlet channels - Home 2a and drain housing 2b arranged, not specified partition goes out and is limited at its other end by a cover 3b such that an annular gap nozzle 3c is formed between the end of the feed pipe 3a and the cover 3b.
  • the cover 3b is at least one
  • the connecting web 3e is connected to the feed pipe 3a, and it is also provided with a preferably centrally arranged, not designated opening, to which a pipe nozzle 3d is connected.
  • the latter is designed in such a way that its opening facing away from the cover 3b has a direction that on the one hand to the head part 1 c of the mixing tank 1 oriented axial and z additionally has a tangential, ie a directional component oriented in the direction of the circumference of the mixing tank 1.
  • a vertical setting angle ⁇ of the pipe nozzle 3d for generating the axial direction component is shown in FIG. 2, the tangential directional component results from a tangential setting angle ⁇ (FIG. 2a)
  • the suspension and dissolution of the solid F in the solvent is as follows: First, the amount of solvent, usually water, required for the amount of solid F to be dissolved is introduced into the mixing tank 1. Then the water is fed from the bottom area via the circulation line 6 by means of the circulation pump 5 of the mixing tank 1 and the subsequent outlet housing 2b are suctioned off and then fed back to the mixing tank 1 via the inlet housing 2a and the feed pipe 3a following this on the way via the annular gap nozzle 3c and the pipe nozzle 3d
  • Solid F is now continuously introduced into the suction line 6a via the feed device 4.
  • This suspension of solid F and solvent passes through the circulation pump 5 and the pressure line 6b into the inlet housing 2a and from there on the way via the inlet pipe 3a to the annular gap nozzle 3c and on the other hand into the pipe nozzle 3d.
  • a feed cross section A in the feed pipe 3a (FIG.
  • the propellant flow T generates a convection flow K in the mixing tank 1, which is oriented upwards on the one hand and tangentially, on the other hand, ie in the direction of the circumference of the mixing tank 1 and which leads to a substantially downward flow in the region of the cylindrical jacket part 1b
  • the bottom region of the mixing tank 1 is crossed by an annular gap flow R generated in the annular gap nozzle 3c.
  • the proposed nozzle device (3) achieves a dissolving time of less than 5 minutes, for example, while comparable known dissolving apparatuses require a dissolving time of 15 to 20 minutes for the same amount of solid F.

Abstract

The invention relates to a nozzle device (3) in a dissolving apparatus for dissolving a solid (F) in a solvent, preferably for dissolving a powdery solid in water. The nozzle device comprises a mixing tank (1) from which the solvent-solid suspension is removed in the bottom part (1a) thereof whereupon the suspension is subsequently pumped outside of the mixing tank (1) through a circulation line (6) and is returned once again. The aim of the invention is to reduce the dissolving time in the mixing tank (1) with regard to that of prior art dissolving apparatuses of the generic type and to simplify the apparatus itself. To these ends, the invention provides that the suspension is introduced into the mixing tank (1) via the nozzle device (3) arranged in the bottom part (1a) of said mixing tank. In addition, the invention provides that the nozzle device, starting from a feed tube (3a) and when viewed in a direction of flow, branches into an annular gap nozzle (3c) and a tubular nozzle (3d), that the annular gap nozzle (3c) generates an annular gap flow (R), which is oriented in an essentially transversal manner with regard to the longitudinal axis of the mixing tank (1), and that the tubular nozzle (3d) generates a driving flow (T) which, with regard to the longitudinal axis of the mixing tank (1), has both an axial and tangential directional component oriented toward the top part (1c) of the mixing tank.

Description

Düsenvorrichtung in einer Auflöseapparatur zur Auflösung eines Feststoffes in einem Lösungsmittel Nozzle device in a dissolving apparatus for dissolving a solid in a solvent
TECHNISCHES GEBIETTECHNICAL AREA
Die Erfindung betrifft eine Düsenvorrichtung in einer Auflöseapparatur zur Auflösung eines Feststoffes in einem Lösungsmittel, vorzugsweise eines pulverförmi- gen Feststoffes in Wasser, nach dem Oberbegriff des Anspruchs 1.The invention relates to a nozzle device in a dissolving apparatus for dissolving a solid in a solvent, preferably a powdery solid in water, according to the preamble of claim 1.
In der Getränkeindustrie besteht oft das Problem, bestimmte Zutaten, die als Feststoff in pulverisierter Form vorliegen, wie beispielsweise Zitronensäure oder Süßstoffe, in eine wäßrige Lösung zu überführen, um sie in diesem Zustand im Rahmen des Herstellungsprozesses des jeweiligen Getränks weiterzuverarbeiten. Zur Auflösung des jeweiligen Feststoffes ist es zunächst erforderlich, diesen im Lösungsmittel, dem Wasser, zu suspendieren.In the beverage industry there is often the problem of converting certain ingredients, which are present as a solid in powdered form, such as, for example, citric acid or sweeteners, into an aqueous solution in order to process them in this state during the production process of the respective beverage. To dissolve the respective solid, it is first necessary to suspend it in the solvent, the water.
STAND DER TECHNIKSTATE OF THE ART
Es ist bekannt, die aufzulösende Menge Feststoff beispielsweise in einen Mischtank einzubringen, in dem die hierzu notwendige Menge Wasser vorgelegt ist, und anschließend mittels einer Rühreinrichtung zu suspendieren. Diese Rühreinrichtung kann beispielsweise aus einem motorisch angetriebenen Rührer bestehen. Darüber hinaus werden die Rührwirkung und Suspendierung noch dadurch verbessert, daß die Lösemittel-Feststoff-Suspension über eine Kreislauf- leitung außerhalb des Mischtanks umgepumpt und letzterem wieder zugeführt wird. Dabei wird üblicherweise die Suspension über den Bodenteil des Mischtanks entnommen und im Bereich des zylinderförmigen Mantelteils wieder zugeführt. Bei der Auflösung von Zitronensäure oder Süßstoffen ergeben sich bei einer derartigen Auflöseapparatur Auflösezeiten beispielsweise von 15 bis 20 Mi- nuten.It is known to introduce the amount of solid to be dissolved, for example, into a mixing tank in which the necessary amount of water is placed, and then to suspend it by means of a stirring device. This stirring device can consist, for example, of a motor-driven stirrer. In addition, the stirring effect and suspension are further improved in that the solvent-solid suspension is pumped around outside the mixing tank via a circuit line and fed back to the latter. The suspension is usually removed via the bottom part of the mixing tank and fed back in the area of the cylindrical jacket part. When citric acid or sweeteners are dissolved, such a dissolving apparatus results in dissolution times of, for example, 15 to 20 minutes.
Neben dem grundsätzlichen Bedürfnis, die Auflösezeiten möglichst kurz zu gestalten, sind insbesondere die motorisch angetriebenen Rühreinrichtungen der bekannten Auflöseapparaturen von Nachteil, "da sie einerseits an sich apparativ relativ aufwendig sind, andererseits aber auch reinigungskritische Einbauten darstellen, die sich oftmals nur schwer oder unzureichend im Wege einer sogenannten automatischen Durchflußreinigung (CIP-Reinigung: Cleaning in place, was soviel bedeutet wie Reinigung an Ort und Stelle) reinigen lassen und die darüber hinaus für sogenannte „Spritzschatten" bei der Ausbringung von Reinigungsflüssigkeit im Mischtank verantwortlich sind.In addition to the basic need to keep the dissolution times as short as possible, the motor-driven stirring devices in particular known dissolving apparatuses disadvantageous, " since on the one hand they are relatively complex in terms of their equipment, on the other hand they also represent installations that are critical for cleaning, which are often difficult or inadequate by means of so-called automatic flow cleaning (CIP cleaning: cleaning in place, which means cleaning have them cleaned on the spot) and who are also responsible for so-called "splash shadows" when applying cleaning fluid in the mixing tank.
Es ist Aufgabe der Erfindung, die Auflösezeit in einem Mischtank gegenüber be- kannten Auflöseapparaturen der gattungsgemäßen Art zu verkürzen und die Apparatur selbst zu vereinfachen.The object of the invention is to shorten the dissolving time in a mixing tank compared to known dissolving devices of the generic type and to simplify the apparatus itself.
ZUSAMMENFASSUNG DER ERFINDUNGSUMMARY OF THE INVENTION
Diese Aufgabe wird durch eine Düsenvorrichtung in einer Auflöseapparatur zur Auflösung eines Feststoffes in einem Lösungsmittel mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausführungsformen der vorgeschlagenen Düsenvorrichtung sind Gegenstand der Unteransprüche.This object is achieved by a nozzle device in a dissolving apparatus for dissolving a solid in a solvent with the features of claim 1. Advantageous embodiments of the proposed nozzle device are the subject of the dependent claims.
Im Gegensatz zu bekannten Auflöseapparaturen wird die Suspension dem Mischtaπk nicht über dessen Mantelteil zugeführt, sondern über dessen Bodenteil. Hierzu ist eine Düsenvorrichtuπg vorgesehen, die sich, ausgehend von einem Zuleitungsrohr und in Strömungsrichtuπg gesehen, in eine Ringspaltduse und eine Rohrdüse verzweigt. Die Ringspaltduse generiert dabei eine Ringspaltströmung, die im wesentlichen quer zur Längsachse des Mischtanks orientiert ist. Der verbleibende Teilstrom der zugeführten Suspension wird über eine Rohrdüse ausgebracht, die im Mischtank eine Treibströmung generiert, die, bezogen auf die Längsachse des Mischtanks, eine zu dessen Kopfteil orientierte axiale und zusätzlich eine tangentiale Richtungskomponente aufweist.In contrast to known opening devices, the suspension is not supplied to the mixing tank via its jacket part, but rather via its bottom part. For this purpose, a nozzle device is provided which, starting from a feed pipe and viewed in the direction of flow, branches into an annular gap nozzle and a pipe nozzle. The annular gap nozzle generates an annular gap flow which is oriented essentially transversely to the longitudinal axis of the mixing tank. The remaining partial flow of the supplied suspension is discharged via a tubular nozzle, which generates a driving flow in the mixing tank, which, with respect to the longitudinal axis of the mixing tank, has an axial and additionally a tangential directional component oriented towards the head part.
Durch die vorgenannten Merkmale wird über die Rohrdüse eine Konvektionsströ- mung im Mischtank erzeugt, die dort den gesamten Tankinhalt erfaßt und diesen sowohl in vertikaler als auch in tangentialer Richtung umwälzt. Der über die Ring- spaltduse ausgebrachte andere Teilstrom der Suspension kreuzt die vorzugsweise abwärts gerichtete Konvektionsstromung und fuhrt dadurch einerseits zu einer intensiven Durchmischung der Suspension und andererseits begünstigt diese sehr energiereiche Querstromung die Suspendierbedingungen Da sowohl die Entnahme der Suspension als auch ihre Zufuhrung über den Bodenteil des Mischtanks erfolgen, kreuzen sich die Konvektionsstromung und die Ringspaltstromung zwangsläufig Durch die Konvektionsstromung wird demnach der gesamte Tankinhalt planmäßig in den Misch- und Auflosungsprozeß einbezogen, stagnierende Bereiche im Tank mit weniger gunstigen Stoffaustauschbedingun- gen werden dadurch zuverlässig vermiedenDue to the above-mentioned features, a convection flow is generated in the mixing tank via the tubular nozzle, which covers the entire tank content there and circulates it both in the vertical and in the tangential direction. The one about the ring The other partial flow of the suspension, which is discharged through the gap nozzle, crosses the preferably downward convection flow and, on the one hand, leads to intensive mixing of the suspension and, on the other hand, this very high-energy cross-flow favors the suspension conditions the convection flow and the annular gap flow inevitably the convection flow therefore includes the entire tank content as planned in the mixing and dissolving process, stagnant areas in the tank with less favorable mass transfer conditions are thereby reliably avoided
Es hat sich als vorteilhaft erwiesen, die Ringspaltduse derart auszubilden, daß sie sich über einen annähernd 360 Grad umfassenden Ausbringungswinkel erstreckt, gemessen in einer senkrecht auf der Langsachse des Mischtanks stehenden Ebene Durch diese Maßnahme wird die Ringspaltstromung über den gesamten Querschnittsbereich des Mischtanks ausgetragen und kann sich dadurch mit der über den gesamten Umfang des zylindrischen Mantels des Mischtanks abwärts stromenden Konvektionsstromung kreuzenIt has proven to be advantageous to design the annular gap nozzle in such a way that it extends over an application angle of approximately 360 degrees, measured in a plane perpendicular to the longitudinal axis of the mixing tank.This measure enables and can discharge the annular gap flow over the entire cross-sectional area of the mixing tank thereby intersect with the convection flow flowing down over the entire circumference of the cylindrical jacket of the mixing tank
Die vorgeschlagene Dusenvorπchtung vereinfacht sich in vorteilhafter Weise, wenn, wie dies weiterhin vorgeschlagen wird, das Zuleitungsrohr der Dusenvor- πchtung durch ein der Entnahme der Suspension aus dem Bodenteil dienendes Ablaufgehause hindurchgefuhrt ist In diesem Falle ist nur eine einzige Öffnung im Bodenteil des Mischtanks erforderlichThe proposed nozzle device is advantageously simplified if, as is also proposed, the feed pipe of the nozzle device is passed through an outlet housing serving to remove the suspension from the bottom part. In this case, only a single opening in the bottom part of the mixing tank is required
Wird, wie dies eine andere Ausfuhrungsform vorsieht, das Zuleitungsrohr koaxial zur Langsachse des Mischtanks im Bodenteil angeordnet, dann vereinfacht sich einerseits die Anordnung zusatzlich, andererseits ergeben sich durch die weitgehend axialsymmetrische Ausprägung des Stromungsbildes im Mischtank beson- ders gunstige Auflose- und Suspendierbedingungen Die Auflose- und Suspendierbedingungen werden weiterhin dann entscheidend verbessert, wenn der zu suspendierende und aufzulosende Feststoff nicht unmittelbar dem Mischtaπk, sondern der im Kreislauf außerhalb des Mischtanks umgepumpten Suspension zugeführt wird Zu diesem Zweck wird vorgeschlagen, daß eine Zufuhreinrichtung für den Feststoff in eine zwischen dem Ablaufgehause und einer Umwälzpumpe vorgesehene Saugleitung einmundetIf, as is provided for by another embodiment, the feed pipe is arranged coaxially to the longitudinal axis of the mixing tank in the base part, the arrangement is simplified on the one hand, on the other hand, the largely axially symmetrical characteristics of the flow pattern in the mixing tank result in particularly favorable dissolving and suspending conditions The dissolving and suspending conditions are further decisively improved if the solid to be suspended and dissolved is not fed directly to the mixing tank, but rather to the suspension pumped around in the circuit outside the mixing tank.For this purpose, it is proposed that a feed device for the solid into a between the Drain housing and a circulation pump provided suction line
Vorteilhafte Bedingungen beim Suspendieren und Auflosen stellen sich ein, wenn die Dusenvorπchtung derart querschnittsmaßig bemessen wird, daß eine mittlere Zufuhrgeschwindigkeit im Zuleitungsrohr v = 2 bis 3 m/s, eine mittlere Ringspalt- geschwindigkeit in der Ringspaltduse Vi = 10 bis 18 m/s und eine mittlere Rohr- geschwindigkeit in der Rohrduse v2 = 3 bis 7 m/s betragenAdvantageous conditions for suspending and dissolving arise when the nozzle device is dimensioned such that an average feed speed in the feed pipe v = 2 to 3 m / s, an average annular gap speed in the annular gap nozzle Vi = 10 to 18 m / s and an average pipe speed in the pipe nozzle v 2 = 3 to 7 m / s
Eine in Bezug auf die vorgenannten Geschwindigkeiten optimierte Auslegung der Dusenvorπchtung weist für die mittlere Zufuhrgeschwindigkeit v = 2,75 m/s, die mittlere Ringspaltgeschwindigkeit v. = 14 m/s und die mittlere Rohrgeschwindig- keit v2 = 5 m/s aufA design of the nozzle device optimized with regard to the aforementioned speeds shows v = 2.75 m / s for the mean feed speed and v for the mean annular gap speed . = 14 m / s and the average pipe speed v 2 = 5 m / s
KURZBESCHREIBUNG DER ZEICHNUNGEN Ein Ausfuhrungsbeispiel der vorgeschlagenen Dusenvorπchtung gemäß der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben Es zeigen Figur 1 in schematischer Darstellung einen Längsschnitt durch einenBRIEF DESCRIPTION OF THE DRAWINGS An exemplary embodiment of the proposed nozzle device according to the invention is shown in the drawing and is described below. FIG. 1 shows a longitudinal section through a schematic illustration
Mischtank und eine dann angeordnete Dusenvorπchtung in Verbin- düng mit weiteren, ebenfalls nur schematisch dargestellten Teilen derMixing tank and a then arranged Düsvorπchtung in conjunction with other, also only shown schematically parts of the
Aufloseapparatur, Figur 2 in vergrößerter Darstellung einen Längsschnitt durch jenen Teil derAufloseapparatur, Figure 2 shows an enlarged view of a longitudinal section through that part of
Dusenvorπchtung, der in Figur 1 mit Einzelheit „X" gekennzeichnet ist und Figur 2a eine Draufsicht auf die Dusenvorπchtung gemäß Figur 2 BEZUGSZEICHENLISTE DER VERWENDETEN ABKÜRZUNGENNozzle device, which is identified by the detail “X” in FIG. 1 and FIG. 2a shows a plan view of the nozzle device according to FIG. 2 REFERENCE SIGN LIST OF ABBREVIATIONS USED
1 Mischtank 6 Kreislaufleitung 1a Bodenteil 6a Saugleitung 1b Mantelteil 6b Druckleitung 1c Kopfteil α vertikaler Anstellwinkel 1d Bodenöffnung ß tangentialer Anstellwinkel1 mixing tank 6 circulation line 1a bottom part 6a suction line 1b jacket part 6b pressure line 1c head part α vertical angle of attack 1d bottom opening ß tangential angle of attack
2 Gehäuse A Zufuhrquerschnitt 2a Zulaufgehäuse Ai Ringspaltquerschnitt 2b Ablaufgehäuse A2 Rohrquerschnitt2 housing A supply cross section 2a inlet housing Ai annular gap cross section 2b outlet housing A 2 pipe cross section
3 Düsenvorrichtung V Zufuhrgeschwindigkeit 3a Zuleitungsrohr Vi Ringspaltgeschwiπdigkeit 3b Deckel v2 Rohrgeschwindigkeit 3c Ringspaltduse F Feststoff 3d Rohrdüse K Konvektionsstromung 3e Verbindungssteg R Ringspaltstromung3 nozzle device V feed speed 3a feed pipe Vi annular gap speed 3b cover v 2 pipe speed 3c annular gap nozzle F solid 3d tubular nozzle K convection flow 3e connecting web R ring gap flow
4 Zuführeinrichtung S Kreislaufströmung4 Feeding device S circulating flow
5 Umwälzpumpe S* Absaugströmung5 Circulating pump S * suction flow
T TreibströmungT driving flow
DETAILLIERTE BESCHREIBUNGDETAILED DESCRIPTION
Die Auflöseapparatur (Figur 1) besteht im wesentlichen aus einem Mischtank 1 , mit einem Bodenteil 1 a, einem zylindrischen Mantelteil 1 b und einem Kopfteil 1 c, einem an den Bodenteil 1a angeflanschten Gehäuse 2, das aus einem Ablaufgehäuse 2b und einem darunter angeordneten Zulaufgehäuse 2a besteht, und einer vom Ablaufgehäuse 2b ausgehenden und in das Zulaufgehäuse 2a einmündenden Kreislaufleitung 6. Letztere besteht aus einer Saugleitung 6a, die das Ablaufgehäuse 2b mit einer Umwälzpumpe 5 verbindet, und einer Druckleitung 6b, die von der Umwälzpumpe 5 zum Zulaufgehäuse 2a führt. Eine Zuführeinrichtung 4 für einen Feststoff F mündet in die Saugleitung 6a ein. Ausgehend von dem Zulaufgehause 2a durchdringt eine Dusenvorπchtung 3 das Ablaufgehause 2b, um über eine Bodenoffnung 1 d im Bodenteil 1 a in den Bodenbereich des Mischtanks 1 einzugreifen Die Dusenvorπchtung 3 besteht aus einem Zuleitungsrohr 3a ( s auch Figur 2), welches von einer zwischen Zulaufge- hause 2a und Ablaufgehause 2b angeordneten, nicht naher bezeichneten Trennwand ausgeht und an seinem anderen Ende von einem Deckel 3b derart begrenzt ist, daß zwischen dem Ende des Zuleitungsrohres 3a und dem Deckel 3b eine Ringspaltduse 3c gebildet wird Der Deckel 3b ist dabei über wenigstens einen Verbindungssteg 3e mit dem Zuleitungsrohr 3a verbunden, und er ist weiterhin mit einer vorzugsweise zentrisch angeordneten, nicht bezeichneten Öffnung versehen, an die eine Rohrduse 3d angeschlossen ist Letztere ist derart ausgestaltet, daß ihre dem Deckel 3b abgewandte Austπttsoffnung eine Richtung aufweist, die zum einen eine zum Kopfteil 1 c des Mischtanks 1 orientierte axiale und zusätzlich eine tangeπtiale, d h eine in Richtung des Umfangs des Mischtanks 1 orientierte Richtungskomponente aufweist Einen vertikalen Anstellwinkel α der Rohrduse 3d zur Erzeugung der axialen Richtungskomponente zeigt Figur 2, die tangentiale Richtungskomponente ergibt sich aus einem tangentialen Anstellwinkel ß (Figur 2a)The opening apparatus (Figure 1) consists essentially of a mixing tank 1, with a bottom part 1 a, a cylindrical jacket part 1 b and a head part 1 c, a housing 2 flanged to the bottom part 1 a, which consists of a drain housing 2 b and an inlet housing arranged underneath 2a, and a circuit line 6 starting from the outlet housing 2b and opening into the inlet housing 2a. The latter consists of a suction line 6a, which connects the outlet housing 2b to a circulation pump 5, and a pressure line 6b, which leads from the circulation pump 5 to the inlet housing 2a. A feed device 4 for a solid F opens into the suction line 6a. Starting from the inlet housing 2a, a nozzle device 3 penetrates the outlet housing 2b in order to engage in the bottom region of the mixing tank 1 via a bottom opening 1d in the bottom part 1a. The nozzle device 3 consists of a feed pipe 3a (see also FIG. 2), which is between one of the inlet channels - Home 2a and drain housing 2b arranged, not specified partition goes out and is limited at its other end by a cover 3b such that an annular gap nozzle 3c is formed between the end of the feed pipe 3a and the cover 3b. The cover 3b is at least one The connecting web 3e is connected to the feed pipe 3a, and it is also provided with a preferably centrally arranged, not designated opening, to which a pipe nozzle 3d is connected. The latter is designed in such a way that its opening facing away from the cover 3b has a direction that on the one hand to the head part 1 c of the mixing tank 1 oriented axial and z additionally has a tangential, ie a directional component oriented in the direction of the circumference of the mixing tank 1. A vertical setting angle α of the pipe nozzle 3d for generating the axial direction component is shown in FIG. 2, the tangential directional component results from a tangential setting angle β (FIG. 2a)
Die Suspendierung und Auflosung des Feststoffes F im Losungsmittel gestaltet sich wie folgt Zunächst wird im Mischtank 1 die für die aufzulosende Menge Feststoff F notwendige Menge Losungsmittel, in der Regel Wasser, vorgelegt Alsdann wird das Wasser über die Kreislaufleitung 6 mittels der Umwälzpumpe 5 aus dem Bodenbereich des Mischtanks 1 und das sich anschließende Ablaufge- hause 2b abgesaugt und anschließend dem Mischtank 1 über das Zulaufgehause 2a und das sich diesem anschließende Zuleitungsrohr 3a auf dem Weg über die Ringspaltduse 3c und die Rohrduse 3d wieder zugeführtThe suspension and dissolution of the solid F in the solvent is as follows: First, the amount of solvent, usually water, required for the amount of solid F to be dissolved is introduced into the mixing tank 1. Then the water is fed from the bottom area via the circulation line 6 by means of the circulation pump 5 of the mixing tank 1 and the subsequent outlet housing 2b are suctioned off and then fed back to the mixing tank 1 via the inlet housing 2a and the feed pipe 3a following this on the way via the annular gap nozzle 3c and the pipe nozzle 3d
Nun wird über die Zufuhreinrichtung 4 kontinuierlich Feststoff F in die Saugleitung 6a eingebracht Diese Suspension aus Feststoff F und Losungsmittel gelangt über die Umwälzpumpe 5 und die Druckleitung 6b in das Zulaufgehause 2a und von dort auf dem Weg über das Zuleitungsrohr 3a einerseits in die Ringspaltduse 3c und andererseits in die Rohrduse 3d Dabei ist ein Zufuhrquerschnitt A im Zuleitungsrohr 3a (Figur 2) vorzugsweise derart bemessen, daß eine mittlere Zu- fuhrgeschwindigkeit v einer sich in dem Zuleitungsrohr 3a ausbildenden Kreis- laufstromung S etwa v = 2 bis 3 m/s, vorzugsweise v = 2,75 m/s, betragt Aus der Rohrduse 3d tritt eine Treibstromung T aus, die aufgrund ihres Rohrquerschnittes A2 eine Rohrgeschwindigkeit v2 = 3 bis 7 m/s, vorzugsweise v2 = 5 m/s, besitzt Die Treibstromung T generiert im Mischtank 1 eine Konvektionsstromung K, die zum einen aufwärts und zum andern tangential, d h in Richtung des Umfanges des Mischtanks 1 orientiert ist und die im Bereich des zylindrischen Mantelteils 1 b zu einer im wesentlichen abwärts gerichteten Strömung fuhrt Letztere wird im Bodenbereich des Mischtanks 1 von einer in der Ringspaltduse 3c generierten Ringspaltstromung R gekreuzt Aufgrund dieser sich kreuzenden Strömungen ergibt sich eine intensive Suspeπdierung und Mischbewegung Eine der Kreislauf- Strömung S entsprechende Absaugstromung S* verlaßt über die Bodenoffnung 1 d den Mischtaπk 1 Ein Ringspaltquerschnitt Ai der Ringspaltduse 3c ist derart bemessen, daß die Ringspaltstromung R eine mittlere Ringspaltgeschwindigkeit V = 10 bis 18 m/s, vorzugsweise VT = 14 m/s, besitztSolid F is now continuously introduced into the suction line 6a via the feed device 4. This suspension of solid F and solvent passes through the circulation pump 5 and the pressure line 6b into the inlet housing 2a and from there on the way via the inlet pipe 3a to the annular gap nozzle 3c and on the other hand into the pipe nozzle 3d. A feed cross section A in the feed pipe 3a (FIG. 2) is preferably dimensioned such that an average feed speed v of a circulating flow S formed in the feed pipe 3a is approximately v = 2 to 3 m / s , preferably v = 2.75 m / s, from the pipe nozzle 3d, a propellant flow T emerges which, due to its pipe cross section A 2, has a pipe speed v 2 = 3 to 7 m / s, preferably v 2 = 5 m / s The propellant flow T generates a convection flow K in the mixing tank 1, which is oriented upwards on the one hand and tangentially, on the other hand, ie in the direction of the circumference of the mixing tank 1 and which leads to a substantially downward flow in the region of the cylindrical jacket part 1b The bottom region of the mixing tank 1 is crossed by an annular gap flow R generated in the annular gap nozzle 3c. Because of these intersecting currents, there is an intensive suspension and mixing movement ng One of the circulatory flow S corresponding Absaugstromung S * leave via the bottom opening 1 d the Mischtaπk 1 An annular gap cross section Ai is 3c of Ringspaltduse dimensioned such that the Ringspaltstromung R a mean annular gap rate V = 10 to 18 m / s, preferably V T = 14 m / s
Es hat sich gezeigt, daß mit der vorgeschlagenen Dusenvorπchtung (3) eine Auf- losezeit beispielsweise von unter 5 Minuten erreicht wird, wahrend vergleichbare bekannte Aufloseapparaturen für die gleiche Menge Feststoff F eine Auflosezeit von 15 bis 20 Minuten benotigen It has been shown that the proposed nozzle device (3) achieves a dissolving time of less than 5 minutes, for example, while comparable known dissolving apparatuses require a dissolving time of 15 to 20 minutes for the same amount of solid F.

Claims

Patentansprücheclaims
1. Dusenvorπchtung (3) in einer Aufloseapparatur zur Auflosung eines Feststoffes (F) in einem Losungsmittel, vorzugsweise eines pulverformigen Feststoffes in Wasser, mit einem Mischtank (1 ), dem die Losungsmittel-Feststoff-Suspen- sion in dessen Bodenteil (1 a) entnommen, bei dem die Suspension anschlies- send durch eine Kreislaufleitung (6) außerhalb des Mischtanks (1 ) umgepumpt und wieder zugeführt wird, dadurch gekennzeichnet1. Düsvorπchtung (3) in a dissolving apparatus for dissolving a solid (F) in a solvent, preferably a powdery solid in water, with a mixing tank (1), which the solvent-solid suspension in the bottom part (1 a) removed, in which the suspension is then pumped through a circuit line (6) outside the mixing tank (1) and fed again, characterized
• daß die Zufuhrung der Suspension in den Mischtank (1 ) über die in dessen Bodenteil (1 a) angeordnete Dusenvorπchtung (3) erfolgt,That the suspension is fed into the mixing tank (1) via the nozzle device (3) arranged in its base part (1 a),
• daß diese sich, ausgehend von einem Zuleitungsrohr (3a) und in Stro- mungsπchtung gesehen, in eine Ringspaltduse (3c) und eine Rohrduse• that this, starting from a feed pipe (3a) and in flow direction, seen in an annular gap nozzle (3c) and a pipe nozzle
(3d) verzweigt,(3d) branches,
• daß die Ringspaltduse (3c) eine Ringspaltstromung (R) generiert,That the annular gap nozzle (3c) generates an annular gap flow (R),
• die im wesentlichen quer zur Langsachse des Mischtanks (1 ) orientiert ist,Which is oriented essentially transversely to the longitudinal axis of the mixing tank (1),
• und daß die Rohrduse (3d) eine Treibstromung (T) generiert, • die, bezogen auf die Langsachse des Mischtanks (1 ), eine zu dessen• and that the pipe nozzle (3d) generates a motive flow (T), • which, based on the longitudinal axis of the mixing tank (1), is one of the latter
Kopfteil (1 c) orientierte axiale und zusätzlich eine tangentiale Richtungskomponente aufweistHead part (1 c) oriented axial and additionally a tangential directional component
Dusenvorπchtung nach Anspruch 1 , dadurch gekennzeichnet, daß sich die Ringspaltduse (3c) über einen annähernd 360 Grad umfassenden Ausbringungswinkel erstreckt, gemessen in einer senkrecht auf der Langsachse des Mischtanks (1 ) stehenden EbeneNozzle device according to claim 1, characterized in that the annular gap nozzle (3c) extends over an application angle of approximately 360 degrees, measured in a plane perpendicular to the longitudinal axis of the mixing tank (1)
Dusenvorπchtuπg nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Zuleitungsrohr (3a) der Dusenvorπchtung (3) durch ein der Entnahme derDusenvorπchtuπg according to claim 1 or 2, characterized in that the feed pipe (3a) of the Dusenvorπchtung (3) by removing the
Suspension aus dem Bodenteil (1 a) dienendes Ablaufgehause (2b) hindurch- gefuhrt ist Suspension from the bottom part (1 a) serving drain housing (2b) is passed
4. Dusenvorπchtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Zuleitungsrohr (3a) koaxial zur Langsachse des Mischtanks (1 ) im Bodenteil (1a) angeordnet ist4. Dusenvorπchtung according to one of claims 1 to 3, characterized in that the feed pipe (3a) is arranged coaxially to the longitudinal axis of the mixing tank (1) in the bottom part (1a)
5. Dusenvorπchtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß eine Zufuhreinrichtung (4) für den Feststoff (F) in eine zwischen dem Ablaufgehause (2b) und einer Umwälzpumpe (5) vorgesehene Saugleitung (6a) einmundet5. Dusenvorπchtung according to one of claims 1 to 4, characterized in that a feed device (4) for the solid (F) in a between the drain housing (2b) and a circulation pump (5) provided suction line (6a)
6 Dusenvorπchtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß eine mittlere Zufuhrgeschwindigkeit v im Zuleitungsrohr (3a)
Figure imgf000011_0001
eine mittlere Rmgspaltgeschwindigkeit v. in der Ringspaltduse (3c)
Figure imgf000011_0002
und eine mittlere Rohrgeschwindigkeit v2 in der Rohrduse (3d)
Figure imgf000011_0003
betragen6 nozzle device according to one of claims 1 to 5, characterized in that an average feed speed v in the feed pipe (3a)
Figure imgf000011_0001
an average belt gap speed v . in the annular gap nozzle (3c)
Figure imgf000011_0002
and an average pipe speed v 2 in the pipe nozzle (3d)
Figure imgf000011_0003
be
Dusenvorπchtung nach Anspruch 6, dadurch gekennzeichnet, daß die mittlere Zufuhrgeschwindigkeit v = 2,75 m/s betragtDüsvorπchtung according to claim 6, characterized in that the average feed speed is v = 2.75 m / s
Dusenvorπchtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die mittlere Ringsspaltgeschwindigkeit v = 14 m/s betragtDusenvorπchtung according to claim 6 or 7, characterized in that the average annular gap speed is v = 14 m / s
Dusenvorπchtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die mittlere Rohrgeschwindigkeit v2 = 5 m/s betragt Nozzle device according to one of claims 6 to 8, characterized in that the average pipe speed is v 2 = 5 m / s
PCT/EP2001/000486 2000-01-19 2001-01-17 Nozzle device in a dissolving apparatus for dissolving a solid in a solvent WO2001053191A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01909639A EP1248743B1 (en) 2000-01-19 2001-01-17 Dissolving apparatus with a nozzle device for dissolving a solid in a solvent
JP2001553207A JP2003520129A (en) 2000-01-19 2001-01-17 A dissolving device having a nozzle device for dissolving a solid in a solvent
AT01909639T ATE254576T1 (en) 2000-01-19 2001-01-17 DISSOLUTION APPARATUS WITH A NOZZLE DEVICE FOR DISSOLVING A SOLID IN A SOLVENT
DE50100992T DE50100992D1 (en) 2000-01-19 2001-01-17 SOLVING APPARATUS WITH A NOZZLE DEVICE FOR SOLVING A SOLID IN A SOLVENT

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DE20000841U DE20000841U1 (en) 2000-01-19 2000-01-19 Nozzle device in a dissolving apparatus for dissolving a solid in a solvent
DE20000841.2 2000-01-19

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EP1248743A2 (en) 2002-10-16
DE20000841U1 (en) 2000-03-30
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JP2003520129A (en) 2003-07-02

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