EP2216090B1 - Metering device and method for feeding a fluid into a fluid flow - Google Patents
Metering device and method for feeding a fluid into a fluid flow Download PDFInfo
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- EP2216090B1 EP2216090B1 EP10150645A EP10150645A EP2216090B1 EP 2216090 B1 EP2216090 B1 EP 2216090B1 EP 10150645 A EP10150645 A EP 10150645A EP 10150645 A EP10150645 A EP 10150645A EP 2216090 B1 EP2216090 B1 EP 2216090B1
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- Prior art keywords
- fluid
- fluid flow
- tube section
- supplying
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- 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
- B01F23/451—Mixing liquids with liquids; Emulsifying using flow mixing by injecting one liquid into another
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- 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
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
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- 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
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
- B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
- B01F25/31331—Perforated, multi-opening, with a plurality of holes
Definitions
- the invention relates to a metering device for supplying a fluid into a fluid flow according to the preamble of independent claim 1 and to a method for metering a fluid into a fluid flow.
- a metering device for supplying a fluid in a fluid flow of the type mentioned is known.
- a pipe section is arranged in a fluid main line, wherein this pipe section is connected via an angle piece with a metering pump.
- This pipe section has a plurality of throttle openings at its periphery.
- the fluid is pumped under pressure into this tube section and exits vertically with respect to the fluid flow therein.
- the supply of the fluid into the fluid flow depends in this case on the fixed parameters of the cross sections of the openings of the pressure in the supply line. With pressure fluctuations by a metering pump, fluctuations in the supply quantity for the fluid thus continue to result.
- the cited document also proposes to include the pipe section in an open cylinder, which is also arranged in the fluid flow line. This results in a two-stage interference of Fluids in the fluid flow, whereby concentration fluctuations can be reduced.
- WO 94/00225 A1 is a mixing device for two fluids having different temperatures known.
- a nozzle element is inserted into the line for a fluid flow, said nozzle element operates on the venturi principle.
- a Venturi nozzle is used, which is enclosed by an outer jacket of the nozzle member. Between the Venturi nozzle and the outer jacket, a fluid chamber is formed. By a main pump fluid is supplied to this fluid chamber. Openings are provided on the venturi to connect the area within the nozzle to the fluid chamber. As the fluid stream passes through the venturi, it is accelerated so that the resulting vacuum sucks the fluid into the main fluid stream and causes some premixing within the nozzle element. This premixed cleaning liquid enters the main stream at the end of the Venturi nozzle and mixes with it.
- this device can achieve a relatively good mixing, but requires a high design effort, which can only be realized with correspondingly high costs.
- Another metering device is from the US-A-5971371 known.
- a metering device for supplying a fluid into a fluid stream, which is guided in a first pipe section, with a second pipe section which is arranged in the first pipe section and a fluid port for supplying the fluid into the second pipe section, wherein the second tube section has at least one throttle opening for feeding the fluid from the second tube section into the fluid flow into the first tube section, which is characterized in that the second tube section has a dynamic pressure opening which is directed counter to the fluid flow.
- a fluid can be fed discontinuously to the device and still results in a uniform concentration in a continuous fluid flow.
- the metering rate of the fluid into the fluid flow depends on the back pressure of the fluid flow at the dynamic pressure port, this back pressure being directly related to the flow rate in the fluid flow. In the event of fluctuations in the fluid flow, the metering rate of the fluid is thus adapted directly, without the need for elaborate control of a metering pump or the like.
- the device may be used by sizing for all other beverage pumping dosing pump applications. That In addition to the detergent dosing syrup can be dosed into a stream of water, for example.
- the present object is achieved according to the invention by a method for metering a fluid into a fluid flow, wherein a volume of the fluid is applied directly to a back pressure of the fluid flow and the pressurized fluid throttled delivered to the fluid flow and fluid volume as a function of the fluid flow discharged fluid is supplied.
- Fig. 1 shows the metering device with a first pipe section 3, which is part of a bottling plant not shown in detail.
- a second pipe section 4 is preferably used concentrically.
- This second pipe section 4 is cylindrical.
- a supply pipe 5 is attached to the second pipe section, this supply pipe for supplying a fluid 2, for example a cleaning fluid, and on the other hand holds the second pipe section 4 in the first pipe section 3.
- the supply pipe 5 is connected to a metering pump (not shown).
- the second pipe section 4 has an open end.
- the opposite end of the second pipe section 4 is closed by a plate 9, as in the FIGS. 1 and 2 shown.
- a first throttle opening 6 is arranged in this plate 9, as shown in the FIGS. 1 . 2 and 6 is shown.
- This first throttle opening 6 is formed concentrically in the second pipe section 4 and also concentrically with respect to the first pipe section 3.
- On the peripheral surface of the second pipe section 4 further throttle openings 8 are provided. These further throttle openings 8 are uniformly distributed on the lateral surface of the second tube section 4 in the radial direction, the number of which increases in the direction of the open end of the second tube section 4.
- the cross section of the open end of the second pipe section 4 is formed substantially parallel to the cross section of the first throttle opening 6.
- a fluid flow 1 is passed through the first pipe section.
- This fluid stream impinges on the second pipe section 4 at its open end, as in the Fig. 3 is shown.
- This open end forms a dynamic pressure opening 7, which is opposite to the fluid flow 1.
- the fluid flow 1 acts directly perpendicular to the cross section of the dynamic pressure opening. 7
- a cleaning concentrate (cleaning agent) is supplied as fluid 2 to a water stream as fluid stream 1.
- This cleaning concentrate is pumped by the metering pump (not shown) via the feed pipe 5 in the second pipe section 4.
- the minimum supply amount for the cleaning agent is set with respect to the cross-sectional area of the first throttle bore 6. It is determined by the necessary flow for the minimum stroke of the metering pump. In the case of a discontinuous, pulsating supply of the cleaning agent, only part of this cleaning agent is supplied immediately and directly into the fluid flow 1 via the first throttle bore 6. Further cleaning agent, which is not immediately discharged directly, is stored in the second pipe section 4 and delivered to the fluid stream 1 between the pumping strokes.
- This volume of cleaning concentrate in the second pipe section 4 is acted upon directly by the dynamic pressure of the fluid stream 1, which acts on the volume via the dynamic pressure opening 7.
- the metering rate for the cleaning concentrate is thus determined by the cross section of the first throttle opening 6 and the back pressure of the fluid stream 1 and is substantially independent of the characteristics of the metering pump for the cleaning concentrate, as long as a minimum volume is promoted.
- a continuous fluid flow 1 a continuous supply of the cleaning concentrate can thus be achieved, as long as the metering pump ensures intermediate storage of the cleaning concentrate in the second pipe section between the pumping strokes and "overflowing" of the second pipe section at the dynamic pressure opening 7 is prevented by limiting the pumping capacity of the metering pump ,
- the further throttle openings 8 are provided on the lateral surface of the second pipe section 4. These further throttle openings 8 lead cleaning concentrate to the fluid flow 1 in the radial direction, when the delivery volume of the metering pump, starting from the minimum volume, further increased and the volume of cleaning concentrate of two consecutive pump strokes no longer in the time from the beginning of the first stroke to the end of the second stroke through the first throttle opening 6 the fluid flow 1 can be supplied.
- the second pipe section 4 With an increased pumping capacity of the metering pump, the second pipe section 4 thus fills with cleaning concentrate, this then being discharged in a corresponding manner via the further throttle openings 8.
- the maximum delivery volume for the metering pump is thus determined by the sum of the outlet cross sections of all throttle bores 6, 8, since overflow of the second tube section via the dynamic pressure opening 7 is to be prevented.
- cleaning liquid is stored between two pumping strokes in the second pipe section and discharged according to the back pressure by the fluid flow 1 thereto.
- the volume of the second pipe section thus substantially corresponds to at least one delivery stroke volume of the metering pump or is greater than this.
- the volume defined by the second pipe section is to be sized so that the maximum delivery volume of two successive delivery strokes, less the volume delivered by the respective exit cross sections of the throttle bores during the two delivery strokes, can be accommodated.
- the first throttle opening 6 is arranged at the downstream end of the second pipe section.
- a complete emptying of the second pipe section 4 is possible, so that after completion of the cleaning process (stop the metering pump) and a certain purge time no cleaning concentrate in the second pipe section 4 remains.
- the rinsing of the second pipe section 4 can thus be achieved in a simple manner by the fluid flow 1, for example a water flow, so that a bottling plant or the like can be put back into operation directly after the end of the entire cleaning process.
- the sum of the opening cross-sectional area of all holes is so large that at maximum stroke, the storage volume is being emptied.
- the ratio of the cross-sectional area of the dynamic pressure opening 7 to the cross-sectional area of the first throttle opening 6 is set in the range 25: 1.
- the diameter of the first throttle opening 6 is 5 mm, and preferably in a range of 3 to 7 mm, wherein the diameters of the further throttle openings 8 are set at 3 mm, and preferably in a range of 2 to 7 mm
- the diameter of the dynamic pressure opening 7 substantially corresponds to the diameter of the second pipe section 4 and, in the exemplary embodiment shown, is 25 mm, and is preferably in a range of 20 to 40 mm.
- throttle openings 6 and 8 can also be arranged, for example, as slots in the flow direction or transversely to the flow direction of the fluid flow 1.
- a concentrically arranged bore is formed as the first throttle opening 6.
- a plurality of bores can be arranged on the corresponding end plate of the second pipe section.
- throttle openings may also be slit-shaped.
- the metering device operates as a metering rectifier, wherein with a discontinuous fluid delivery, a continuous supply of the fluid can be achieved in a continuous fluid flow.
- the exemplary embodiment shows the metering device as metering rectifier for feeding the fluid 2, for example a cleaning concentrate, into the fluid flow 1, for example a water flow, which is guided in a first tube section 3.
- the second pipe section 4 is arranged in the first pipe section 3 and has a fluid connection 5 for the supply of the fluid 2.
- the second pipe section 4 furthermore has at least one throttle opening 6 for feeding the fluid 2 from the second pipe section 4 into the fluid stream 1 and the dynamic pressure opening 7, which is directed counter to the fluid flow 1.
- the throttle opening 6 is formed in a closed end portion of the second pipe section 4.
- a cross section of the throttle opening 6 is parallel to a cross section of the dynamic pressure opening 7.
- the throttle opening 6 is coaxial with the first pipe section 3.
- the dynamic pressure opening 7 is formed coaxially with the first pipe section 3.
- the second pipe section 4 is coaxial with the first pipe section 3.
- the fluid port 5 is arranged with respect to the fluid flow between the dynamic pressure port 7 and the throttle opening 6, d. H. the cleaning fluid supply pipe 5 is connected closer to the downstream end of the second pipe section 4 than to the dynamic pressure port 7 thereof.
- the second pipe section 4 can fill from the end plate 9, starting against the back pressure with cleaning fluid, whereby a limited mixing of the cleaning fluid with water in the second pipe section 4 takes place. This increases the dosing accuracy in the supply of the cleaning fluid to the fluid flow (water flow) through the throttle openings.
- the cross-sectional ratio of the diameter of the throttle opening 6 to the dynamic pressure opening 7 in the range of 1: 3 to 1: 7, preferably 1: 5.
- further throttle openings 8 are distributed in particular uniformly over the circumference on the lateral surface of the second tube section. These further throttle openings 8 increase the effective throttle cross section of all throttle openings 8 in the direction upstream of the fluid flow.
- the sum of the cross-sectional areas of all bores 6, 8 corresponds at least to the necessary area, so that the volume of the maximum pump stroke can flow off completely.
- a preferred cross-sectional ratio of all throttle openings 8 in the second pipe section 4 to the dynamic pressure opening 7 is in the range from 1: 3 to 1:10, preferably 1: 7.
- the volume of the pressurized fluid 2 in the second pipe section 4 is dependent on the variable or pulsating supply volume of the fluid 2 through the metering pump.
- the volume rate of the fluid 2 delivered to the fluid flow 1 is dependent on the back pressure of the fluid flow 1, but substantially independent of the fluid supply by the metering pump.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Devices For Dispensing Beverages (AREA)
- Nozzles (AREA)
- Medicinal Preparation (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Dosiereinrichtung zum Zuführen eines Fluids in einen Fluidstrom gemäß dem Oberbegriff des unabhängigen Patentanspruchs 1 sowie ein Verfahren zum Dosieren eines Fluids in einen Fluidstrom.The invention relates to a metering device for supplying a fluid into a fluid flow according to the preamble of independent claim 1 and to a method for metering a fluid into a fluid flow.
Bei Abfüllanlagen für Getränke und dergleichen besteht die Notwendigkeit diese Anlagen von Zeit zu Zeit zu reinigen, wobei eine Reinigungsflüssigkeit durch die Teile der Abfüllanlage geführt wird. Beim Reinigungsprozess verbleibt die Anlage im Produktionszustand (CIP-Reinigung), wobei das abzufüllende Getränk durch die Reinigungsflüssigkeit ersetzt wird. Diese Reinigungsflüssigkeit besteht im Wesentlichen aus Wasser, dem ein Reinigungsmittel als Flüssigkeitskonzentrat beigemischt wird. Das Reinigungsmittel wird üblicherweise als Flüssigkeitskonzentrat mit einer pulsierenden Dosierpumpe direkt dem Flüssigkeitsstrom zugeführt. Die diskontinuierliche Zuführung, insbesondere in einen kontinuierlichen Flüssigkeitsstrom, kann zu grösseren Konzentrationsschwankungen in der Reinigungsflüssigkeit führen, so dass die Gleichmäßigkeit der Reinigungswirkung beeinträchtigt ist. Um derartige Konzentrationsschwankungen zu glätten, werden üblicherweise so genannte "Windkessel" eingebaut oder die bereits gemischte Reinigungsflüssigkeit wird mittels einer Zirkulationspumpe umgepumpt, bis eine entsprechende Vermischung erreicht ist.In bottling plants for drinks and the like there is a need to clean these plants from time to time, with a cleaning liquid is passed through the parts of the filling plant. During the cleaning process, the system remains in the production state (CIP cleaning), whereby the beverage to be filled is replaced by the cleaning liquid. This cleaning liquid consists essentially of water to which a cleaning agent is added as a liquid concentrate. The cleaning agent is usually fed as liquid concentrate with a pulsating metering pump directly to the liquid stream. The discontinuous feed, in particular into a continuous liquid stream, can lead to greater concentration fluctuations in the cleaning liquid, so that the uniformity of the cleaning action is impaired. In order to smooth out such fluctuations in concentration, so-called "wind boilers" are usually installed or the already mixed cleaning liquid is circulated by means of a circulation pump until a corresponding mixing is achieved.
Aus der Druckschrift
Aus der weiteren Druckschrift zum Stand der Technik
Eine weitere Dosiervorrichtung ist aus der
Es ist die Aufgabe der vorliegenden Erfindung, eine Dosiereinrichtung zum Zuführen eines Fluids in einen Fluidstrom der eingangs genannten Art sowie ein Verfahren zum Dosieren eines Fluids in einen Fluidstrom zu schaffen, wobei das Fluid in zuverlässiger und gleichmäßiger Weise einfach dem Fluidstrom zugeführt werden kann.It is the object of the present invention to provide a metering device for supplying a fluid into a fluid flow of the type mentioned in the introduction and a method for metering a fluid into a fluid flow, wherein the fluid can be supplied to the fluid flow in a reliable and uniform manner.
Diese Aufgabe wird erfindungsgemäß gelöst durch eine Dosiereinrichtung zum Zuführen eines Fluids in einen Fluidstrom, der in einem ersten Rohrabschnitt geführt wird, mit einem zweiten Rohrabschnitt, der in dem ersten Rohrabschnitt angeordnet ist und einen Fluidanschluss zur Zuführung des Fluids in den zweiten Rohrabschnitt aufweist, wobei der zweite Rohrabschnitt zumindest eine Drosselöffnung zur Zuführung des Fluids von dem zweiten Rohrabschnitt in den Fluidstrom in den ersten Rohrabschnitt aufweist, die dadurch gekennzeichnet ist, dass der zweite Rohrabschnitt eine Staudrucköffnung aufweist, die dem Fluidstrom entgegen gerichtet ist.This object is achieved by a metering device for supplying a fluid into a fluid stream, which is guided in a first pipe section, with a second pipe section which is arranged in the first pipe section and a fluid port for supplying the fluid into the second pipe section, wherein the second tube section has at least one throttle opening for feeding the fluid from the second tube section into the fluid flow into the first tube section, which is characterized in that the second tube section has a dynamic pressure opening which is directed counter to the fluid flow.
Bei dieser Lösung kann ein Fluid diskontinuierlich der Einrichtung zugeführt werden und trotzdem ergibt sich eine gleichmäßige Konzentration bei einem kontinuierlichen Fluidstrom. Insbesondere hängt die Dosierrate des Fluids in den Fluidstrom von dem Staudruck des Fluidstroms an der Staudrucköffnung ab, wobei dieser Staudruck in direktem Zusammenhang mit dem Durchsatz in dem Fluidstrom steht. Bei Schwankungen in dem Fluidstrom wird somit die Dosierrate des Fluids direkt angepasst, ohne dass eine aufwendige Regelung an einer Dosierpumpe oder dergleichen vorzunehmen ist.In this solution, a fluid can be fed discontinuously to the device and still results in a uniform concentration in a continuous fluid flow. In particular, the metering rate of the fluid into the fluid flow depends on the back pressure of the fluid flow at the dynamic pressure port, this back pressure being directly related to the flow rate in the fluid flow. In the event of fluctuations in the fluid flow, the metering rate of the fluid is thus adapted directly, without the need for elaborate control of a metering pump or the like.
Die Vorrichtung kann durch Größenanpassung für alle anderen Dosierpumpenanwendungen der Getränkeherstellung verwendet werden. D.h. neben der Reinigungsmitteldosage kann auch beispielsweise Sirup in einen Wasserstrom dosiert werden.The device may be used by sizing for all other beverage pumping dosing pump applications. That In addition to the detergent dosing syrup can be dosed into a stream of water, for example.
Bevorzugte Weiterbildungen des Erfindungsgegenstands sind in den Unteransprüchen dargelegt.Preferred developments of the subject invention are set forth in the subclaims.
Weiterhin wird die vorliegende Aufgabe erfindungsgemäß gelöst durch ein Verfahren zum Dosieren eines Fluids in einen Fluidstrom, wobei ein Volumen des Fluids direkt mit einem Staudruck des Fluidstroms beaufschlagt wird und das druckbeaufschlagte Fluid gedrosselt an den Fluidstrom abgegeben und Fluid dem Volumen in Abhängigkeit des an den Fluidstrom abgegebenen Fluids zugeführt wird.Furthermore, the present object is achieved according to the invention by a method for metering a fluid into a fluid flow, wherein a volume of the fluid is applied directly to a back pressure of the fluid flow and the pressurized fluid throttled delivered to the fluid flow and fluid volume as a function of the fluid flow discharged fluid is supplied.
Bevorzugte Weiterbildungen des Erfindungsgegenstands sind in den Unteransprüchen beschrieben.Preferred developments of the subject invention are described in the subclaims.
Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit den beigefügten Zeichnungen näher beschrieben und erläutert. In den Zeichnungen zeigen
- Fig. 1
- eine perspektivische Seitenansicht der erfindungsgemässen Dosiereinrich- tung gemäß einem Ausführungsbeispiel in einem Rohrabschnitt einer Abfüll- anlage oder dergleichen;
- Fig. 2
- eine Ansicht von schräg oben auf das Ausführungsbeispiels gemäß
Fig. 1 , wobei der äußere Rohrabschnitt nicht dargestellt ist; - Fig. 3
- eine perspektivische Seitenansicht des Ausführungsbeispiels der
Fig. 1 mit Ansicht der Staudrucköffnung; - Fig. 4
- eine Rückansicht des Ausführungsbeispiels der
Figuren 1 bis 3 ; - Fig. 5
- eine Draufsicht auf das Ausführungsbeispiels der vorangenannten Figuren; und
- Fig. 6
- eine Ansicht des Ausführungsbeispiels in Richtung entgegengesetzt zu dem Fluidstrom.
- Fig. 1
- a perspective side view of the inventive metering device according to an embodiment in a pipe section of a filling plant or the like;
- Fig. 2
- a view obliquely from above of the embodiment according to
Fig. 1 wherein the outer pipe section is not shown; - Fig. 3
- a side perspective view of the embodiment of
Fig. 1 with view of the dynamic pressure opening; - Fig. 4
- a rear view of the embodiment of
FIGS. 1 to 3 ; - Fig. 5
- a plan view of the embodiment of the aforementioned figures; and
- Fig. 6
- a view of the embodiment in the direction opposite to the fluid flow.
Wie in den
Wie in den
Im Betrieb der Dosiereinrichtung wird ein Reinigungskonzentrat (Reinigungsmittel) als Fluid 2 einem Wasserstrom als Fluidstrom 1 zugeführt. Dieses Reinigungskonzentrat wird durch die Dosierpumpe (nicht gezeigt) über das Zuführrohr 5 in den zweiten Rohrabschnitt 4 gepumpt. Die minimale Zufuhrmenge für das Reinigungsmittel ist mit Bezug auf die Querschnittsfläche der ersten Drosselbohrung 6 festgelegt. Sie wird durch den notwendigen Fluss für den minimalen Hub der Dosierpumpe bestimmt. Bei einer diskontinuierlichen, pulsierenden Zuführung des Reinigungsmittels wird nur ein Teil dieses Reinigungsmittels sofort und direkt über die erste Drosselbohrung 6 in den Fluidstrom 1 zugeführt. Weiteres Reinigungsmittel, das nicht sofort direkt abgegeben wird, wird in dem zweiten Rohrabschnitt 4 gespeichert und zwischen den Pumphüben an den Fluidstrom 1 abgegeben. Dieses Volumen von Reinigungskonzentrat in dem zweiten Rohrabschnitt 4 wird direkt durch den Staudruck des Fluidstroms 1 beaufschlagt, der über die Staudrucköffnung 7 auf dieses Volumen wirkt. Die Dosierrate für das Reinigungskonzentrat wird somit durch den Querschnitt der ersten Drosselöffnung 6 und den Staudruck des Fluidstroms 1 bestimmt und ist im Wesentlichen unabhängig von der Charakteristik der Dosierpumpe für das Reinigungskonzentrat, solange ein Mindestvolumen gefördert wird. Bei einem kontinuierlichen Fluidstrom 1 kann somit eine kontinuierliche Zuführung des Reinigungskonzentrats erreicht werden, solange die Dosierpumpe eine Zwischenspeicherung des Reinigungskonzentrats in dem zweiten Rohrabschnitt zwischen den Pumphüben gewährleistet und ein "Überlaufen" des zweiten Rohrabschnitts an der Staudrucköffnung 7 durch Begrenzung der Pumpleistung der Dosierpumpe verhindert wird.During operation of the metering device, a cleaning concentrate (cleaning agent) is supplied as fluid 2 to a water stream as fluid stream 1. This cleaning concentrate is pumped by the metering pump (not shown) via the
Zur weiteren Steuerung der Dosiermenge für die Reinigungsflüssigkeit sind an der Mantelfläche des zweiten Rohrabschnitts 4 die weiteren Drosselöffnungen 8 vorgesehen. Diese weiteren Drosselöffnungen 8 führen Reinigungskonzentrat dem Fluidstrom 1 in radialer Richtung zu, wenn das Fördervolumen der Dosierpumpe, ausgehend von dem Mindestvolumen, weiter erhöht wird und das Volumen an Reinigungskonzentrat von zwei aufeinanderfolgenden Pumphüben nicht mehr in der Zeit vom Beginn des ersten Hubs bis Ende des zweiten Hubs durch die erste Drosselöffnung 6 dem Fluidstrom 1 zugeführt werden kann. Bei erhöhter Pumpleistung der Dosierpumpe füllt sich somit der zweite Rohrabschnitt 4 mit Reinigungskonzentrat, wobei dieses dann in entsprechender Weise über die weiteren Drosselöffnungen 8 abgeführt wird. Das maximale Fördervolumen für die Dosierpumpe wird somit durch die Summe der Austrittsquerschnitte aller Drosselbohrungen 6, 8 bestimmt, da ein Überlaufen des zweiten Rohrabschnitts über die Staudrucköffnung 7 verhindert werden soll.For further control of the dosing amount for the cleaning liquid, the
Bei der Dosiereinrichtung gemäß dem Ausführungsbeispiel wird Reinigungsflüssigkeit zwischen zwei Pumphüben in dem zweiten Rohrabschnitt gespeichert und gemäß dem Staudruck durch den Fluidstrom 1 an diesen abgegeben. Das Volumen des zweiten Rohrabschnitts entspricht somit im Wesentlichen mindestens einem Förderhubvolumen der Dosierpumpe oder ist größer als dieses. Insbesondere ist das Volumen, das durch den zweiten Rohrabschnitt definiert wird so groß zu bemessen, dass das maximale Fördervolumen zweier aufeinanderfolgender Förderhübe, abzüglich des Volumens, das durch die entsprechenden Austrittsquerschnitte der Drosselbohrungen während der beiden Förderhübe abgegeben wird, aufgenommen werden kann.In the metering device according to the embodiment, cleaning liquid is stored between two pumping strokes in the second pipe section and discharged according to the back pressure by the fluid flow 1 thereto. The volume of the second pipe section thus substantially corresponds to at least one delivery stroke volume of the metering pump or is greater than this. In particular, the volume defined by the second pipe section is to be sized so that the maximum delivery volume of two successive delivery strokes, less the volume delivered by the respective exit cross sections of the throttle bores during the two delivery strokes, can be accommodated.
In dem gezeigten Ausführungsbeispiel ist die erste Drosselöffnung 6 am stromabseitigen Ende des zweiten Rohrabschnitts angeordnet. Mit dieser Anordnung ist eine vollständige Entleerung des zweiten Rohrabschnitts 4 möglich, so dass nach Abschluss des Reinigungsvorgangs (Stopp der Dosierpumpe) und einer gewissen Spülzeit kein Reinigungskonzentrat in dem zweiten Rohrabschnitt 4 verbleibt. Das Spülen des zweiten Rohrabschnitts 4 kann somit in einfacher Weise durch den Fluidstrom 1, beispielsweise einen Wasserstrom, erreicht werden, so dass eine Abfüllanlage oder dergleichen nach Beendigung des gesamten Reinigungsvorgangs direkt wieder in Betrieb genommen werden kann.In the embodiment shown, the
Idealerweise ist die Summe der Öffnungsquerschnittsfläche aller Bohrungen so groß, dass bei Maximalhub das Vorratsvolumen gerade entleert wird.Ideally, the sum of the opening cross-sectional area of all holes is so large that at maximum stroke, the storage volume is being emptied.
Gemäß dem gezeigten Ausführungsbeispiel ist das Verhältnis der Querschnittsfläche der Staudrucköffnung 7 zur Querschnittsfläche der ersten Drosselöffnung 6 im Bereich 25:1 festgelegt. In dem gezeigten Ausführungsbeispiel ist der Durchmesser der ersten Drosselöffnung 6 mit 5 mm, und bevorzugt in einem Bereich von 3 bis 7 mm, wobei die Durchmesser der weiteren Drosselöffnungen 8 mit 3 mm, und bevorzugt in einem Bereich von 2 bis 7 mm, festgelegt sind. Der Durchmesser der Staudrucköffnung 7 entspricht im Wesentlichen dem Durchmesser des zweiten Rohrabschnitts 4 und beträgt in dem gezeigten Ausführungsbeispiel 25 mm, und ist bevorzugt in einem Bereich von 20 bis 40 mm.According to the embodiment shown, the ratio of the cross-sectional area of the dynamic pressure opening 7 to the cross-sectional area of the
Alternativ zu den gezeigten Bohrungen als Drosselöffnungen 6 und 8 können solche Drosselöffnungen auch zum Beispiel als Schlitze in Strömungsrichtung oder quer zur Strömungsrichtung des Fluidstroms 1 angeordnet werden.As an alternative to the holes shown as
In dem gezeigten Ausführungsbeispiel ist als erste Drosselöffnung 6 eine konzentrisch angeordnete Bohrung ausgebildet. Alternativ zu dieser Anordnung können mehrere Bohrungen an der entsprechenden Endplatte des zweiten Rohrabschnitts angeordnet werden. Weiterhin können derartige Drosselöffnungen auch schlitzförmig ausgebildet sein.In the embodiment shown, a concentrically arranged bore is formed as the
Die Dosiereinrichtung gemäß dem Ausführungsbeispiel arbeitet als Dosiergleichrichter, wobei mit einer diskontinuierlichen Fluidförderung eine kontinuierliche Zuführung des Fluids in einen kontinuierlichen Fluidstrom erreicht werden kann.The metering device according to the embodiment operates as a metering rectifier, wherein with a discontinuous fluid delivery, a continuous supply of the fluid can be achieved in a continuous fluid flow.
Das Ausführungsbeispiel zeigt die Dosiereinrichtung als Dosiergleichrichter zum Zuführen des Fluids 2, beispielsweise eines Reinigungskonzentrats, in den Fluidstrom 1, beispielsweise einen Wasserstrom, der in einem ersten Rohrabschnitt 3 geführt wird. Der zweite Rohrabschnitt 4 ist in dem ersten Rohrabschnitt 3 angeordnet und weist einen Fluidanschluss 5 zur Zuführung des Fluids 2 auf. Der zweite Rohrabschnitt 4 weist weiterhin zumindest eine Drosselöffnung 6 zur Zuführung des Fluids 2 von dem zweiten Rohrabschnitt 4 in den Fluidstrom 1 und die Staudrucköffnung 7 auf, die dem Fluidstrom 1 entgegen gerichtet ist.The exemplary embodiment shows the metering device as metering rectifier for feeding the fluid 2, for example a cleaning concentrate, into the fluid flow 1, for example a water flow, which is guided in a
Mit der dargestellten Vorrichtung kann das erfindungsgemäße Verfahren wie folgt durchgeführt werden:
- Das Fluid 2 wird in den Innenraum des zweiten Rohrabschnitt über das Zuführrohr mit Hilfe der nicht dargestellten Schlauchpumpe gefördert. Dort trifft es auf den im Inneren dieses Rohrabschnittes sich stauenden Fluidstrom. Nach einer gewissen Vermischung des zugeführten Fluids mit dem angestauten Fluidstrom in dem zweiten Rohrabschnitt wird dieses Fluidvolumen direkt mit dem Staudruck des Fluidstroms 1 beaufschlagt.
Dieses druckbeaufschlagte Fluidvolumen wird gedrosselt an den Fluidstrom 1 abgegeben. Trotz der pulsierenden Charakteristik der Schlauchpumpe kann eine wesentlich kontinuierlichere Zufuhr des Fluids an den Fluidstrom erfolgen.
- The fluid 2 is conveyed into the interior of the second pipe section via the feed tube by means of the hose pump, not shown. There it encounters the fluid flow that accumulates in the interior of this pipe section. After a certain mixing of the supplied fluid with the accumulated fluid flow in the second pipe section of this fluid volume is directly applied to the back pressure of the fluid flow 1.
This pressurized fluid volume is throttled delivered to the fluid flow 1. Despite the pulsating characteristic of the peristaltic pump, a substantially more continuous supply of the fluid to the fluid flow can take place.
Bei dem Ausführungsbeispiel der Dosiereinrichtung ist die Drosselöffnung 6 in einem geschlossenen Endabschnitt des zweiten Rohrabschnitts 4 ausgebildet. Ein Querschnitt der Drosselöffnung 6 ist parallel zu einem Querschnitt der Staudrucköffnung 7. Dadurch kann eine vollständige Entleerung des zweiten Rohrabschnitts 4 nach dem Stopp der Dosierpumpe erreicht werden.In the embodiment of the metering device, the
In der Dosiereinrichtung ist die Drosselöffnung 6 koaxial zum ersten Rohrabschnitt 3. Die Staudrucköffnung 7 ist koaxial zu dem ersten Rohrabschnitt 3 ausgebildet. Der zweite Rohrabschnitt 4 ist koaxial zu dem ersten Rohrabschnitt 3. Dadurch wird das Reinigungskonzentrat in der Mitte des Fluidstroms 1 zugeführt.In the metering device, the
Bei diesem Ausführungsbeispiel der Dosiereinrichtung ist der Fluidanschluss 5 bezüglich des Fluidstroms zwischen der Staudrucköffnung 7 und der Drosselöffnung 6 angeordnet, d. h. das Zuführrohr 5 für das Reinigungsfluid ist näher an dem stromabwärts gelegenen Ende des zweiten Rohrabschnitts 4 als an dessen Staudrucköffnung 7 angeschlossen. Dadurch kann sich der zweite Rohrabschnitt 4 von der Endplatte 9 ausgehend entgegen dem Staudruck mit Reinigungsfluid füllen, wobei eine begrenzte Durchmischung des Reinigungsfluids mit Wasser in dem zweiten Rohrabschnitt 4 erfolgt. Dies erhöht die Dosiergenauigkeit bei der Zuführung des Reinigungsfluids an den Fluidstrom (Wasserstrom) durch die Drosselöffnungen.In this embodiment of the metering device, the
Bei diesem Ausführungsbeispiel der Dosiereinrichtung ist das Querschnittsverhältnis der Durchmesser von Drosselöffnung 6 zur Staudrucköffnung 7 im Bereich von 1:3 bis 1:7, vorzugsweise 1:5.In this embodiment of the metering device, the cross-sectional ratio of the diameter of the
In der Dosiereinrichtung gemäß dem Ausführungsbeispiel sind weitere Drosselöffnungen 8 auf der Mantelfläche des zweiten Rohrabschnitts insbesondere gleichmäßig über den Umfang verteilt angeordnet. Diese weiteren Drosselöffnungen 8 erhöhen den wirksamen Drosselquerschnitt aller Drosselöffnungen 8 in Richtung stromauf bezüglich des Fluidstroms. Dabei entspricht die Summe der Querschnittsflächen aller Bohrungen 6, 8 mindestens der notwendigen Fläche, so dass das Volumen des maximalen Pumpenhubes komplett abfließen kann.In the metering device according to the exemplary embodiment,
In der Dosiereinrichtung gemäß dem Ausführungsbeispiel liegt ein bevorzugtes Querschnittsverhältnis aller Drosselöffnungen 8 im zweiten Rohrabschnitt 4 zur Staudrucköffnung 7 im Bereich von 1:3 bis 1:10, vorzugsweise 1:7.In the metering device according to the exemplary embodiment, a preferred cross-sectional ratio of all
Bei dem Verfahren ist das Volumen des druckbeaufschlagten Fluids 2 in dem zweiten Rohrabschnitt 4 von dem veränderbaren oder pulsierenden Zuführvolumen des Fluids 2 durch die Dosierpumpe abhängig. Die Volumenrate des an den Fluidstrom 1 abgegebenen Fluids 2 ist von dem Staudruck des Fluidstroms 1 abhängig, aber im Wesentlichen unabhängig von der Fluidzufuhr durch die Dosierpumpe.In the method, the volume of the pressurized fluid 2 in the
Claims (15)
- Dosing unit for supplying a fluid (2) into a fluid flow (1) which is routed in a first tube section (3), with a second tube section (4) arranged in the first tube section (3) and comprising a fluid port (5) for supplying the fluid (2) into the second tube section (4), wherein the second tube section (4) comprises at least one throttle opening (6) for supplying the fluid (2) from the second tube section (4) into the fluid flow (1) in the first tube section (3), characterized in that the second tube section (4) comprises a dynamic pressure opening (7) directed to be opposite to the fluid flow (1).
- Dosing unit for supplying a fluid into a fluid flow according to claim 1, characterized in that the throttle opening (6) is embodied in a closed end section of the second tube section (4).
- Dosing unit for supplying a fluid into a fluid flow according to claim 1 or 2, characterized in that a cross-section of the throttle opening (6) is in parallel to a cross-section of the dynamic pressure opening (7).
- Dosing unit for supplying a fluid into a fluid flow according to at least one of claims 1 to 3, characterized in that the throttle opening (6) is coaxial with respect to the first tube section (3), and/or the dynamic pressure opening is embodied to be coaxial with respect to the first tube section (3), and/or the second tube section (4) is coaxial with respect to the first tube section (3).
- Dosing unit for supplying a fluid into a fluid flow according to at least one of claims 1 to 4, characterized in that the fluid port (5) is arranged between the dynamic pressure opening (7) and the throttle opening (6) with respect to the fluid flow.
- Dosing unit for supplying a fluid into a fluid flow according to at least one of claims 1 to 5, characterized in that a cross-sectional ratio of the throttle opening (6) with respect to the dynamic pressure opening (7) is within a range of 1:3 to 1:7.
- Dosing unit for supplying a fluid into a fluid flow according to at least one of claims 1 to 6, characterized in that further throttle openings (8) are embodied at the second tube section (4), wherein the further throttle openings (8) are distributed on a surface area, in particular uniformly across a periphery of the second tube section (4).
- Dosing unit for supplying a fluid into a fluid flow according to claim 7, characterized in that the further throttle openings (8) increase the effective cross-section of the throttle openings (8) in the direction upstream with respect to the fluid flow at the second tube section (4), in particular increase it progressively, where the increase of the effective cross-section of the throttle openings (8) is determined depending on a volume enclosed by the second tube section (4).
- Dosing unit for supplying a fluid into a fluid flow according to claim 7 or 8, characterized in that the fluid port (5) is arranged with respect to the fluid flow between a first throttle opening (6) downstream and said further throttle openings (8) being embodied upstream at the surface area of the second tube section (4).
- Dosing unit for supplying a fluid into a fluid flow according to at least one of claims 7 to 9, characterized in that a cross-sectional ratio of all throttle openings (6, 8) at the second tube section (4) with respect to the dynamic pressure opening (7) is within a range of 1:3 to 1:10.
- Method for dosing a fluid (2) into a fluid flow (1) when using the dosing unit according to claim 1, wherein a volume of the fluid (2) is directly loaded by a dynamic pressure of the fluid flow, and the pressurized fluid (2) is delivered to the fluid flow (1) in a throttled manner, and fluid (2) is supplied to the volume depending on the fluid (2) delivered to the fluid flow (1).
- Method for dosing a fluid in a fluid flow according to claim 11, wherein the volume of the pressurized fluid (2) is variable depending on a variable supply volume of the fluid (2).
- Method for dosing a fluid in a fluid flow according to claim 11 or 12, wherein a volume rate of the fluid (2) delivered to the fluid flow (1) depends on the dynamic pressure of the fluid flow (1).
- Method for dosing a fluid in a fluid flow according to one of the claims 11 to 13, wherein the supplied fluid (2) is a detergent and the fluid flow (1) is a water flow.
- Method for dosing a fluid in a fluid flow according to one of the claims 11 to 13, wherein the supplied fluid (2) is a liquid food or beverage concentrate and the fluid flow (1) is a water flow or water-like flow.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10150645T PL2216090T3 (en) | 2009-02-04 | 2010-01-13 | Metering device and method for feeding a fluid into a fluid flow |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009007423A DE102009007423A1 (en) | 2009-02-04 | 2009-02-04 | Metering device and method for supplying a fluid into a fluid stream |
Publications (2)
Publication Number | Publication Date |
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EP2216090A1 EP2216090A1 (en) | 2010-08-11 |
EP2216090B1 true EP2216090B1 (en) | 2011-04-13 |
Family
ID=42124506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP10150645A Active EP2216090B1 (en) | 2009-02-04 | 2010-01-13 | Metering device and method for feeding a fluid into a fluid flow |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2216090B1 (en) |
CN (1) | CN101792103B (en) |
AT (1) | ATE505261T1 (en) |
DE (2) | DE102009007423A1 (en) |
DK (1) | DK2216090T3 (en) |
ES (1) | ES2360930T3 (en) |
PL (1) | PL2216090T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108889484B (en) * | 2018-08-31 | 2019-11-08 | 北方华锦化学工业股份有限公司 | A kind of boat coal production dedicated injected system of antistatic agent |
DE102019132749A1 (en) * | 2019-12-03 | 2021-06-10 | Krones Ag | Device for filling a container with CIP cleaning |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB528954A (en) * | 1938-05-19 | 1940-11-11 | Ernest Le Loarer | Apparatus for mixing fluid |
JPS5939331A (en) | 1982-08-28 | 1984-03-03 | Mitsubishi Heavy Ind Ltd | Promoting structure for mixing in connected pipe |
SE500071C2 (en) | 1992-06-25 | 1994-04-11 | Vattenfall Utveckling Ab | Device for mixing two fluids, in particular liquids of different temperature |
US5971371A (en) * | 1995-10-20 | 1999-10-26 | Cheng; Chen-Chun | Water/air treatment system |
SE508137C2 (en) * | 1996-12-19 | 1998-08-31 | Tetra Laval Holdings & Finance | Method and apparatus for continuous mixing of two streams |
TW529456U (en) * | 2002-06-27 | 2003-04-21 | Nanya Technology Corp | Pipeline for mixing |
DE102006017004B3 (en) * | 2006-04-11 | 2007-10-25 | Airbus Deutschland Gmbh | Device for mixing fresh air and heating air and use thereof in a ventilation system of an aircraft |
-
2009
- 2009-02-04 DE DE102009007423A patent/DE102009007423A1/en not_active Withdrawn
-
2010
- 2010-01-13 PL PL10150645T patent/PL2216090T3/en unknown
- 2010-01-13 DK DK10150645.9T patent/DK2216090T3/en active
- 2010-01-13 DE DE502010000012T patent/DE502010000012D1/en active Active
- 2010-01-13 ES ES10150645T patent/ES2360930T3/en active Active
- 2010-01-13 AT AT10150645T patent/ATE505261T1/en active
- 2010-01-13 EP EP10150645A patent/EP2216090B1/en active Active
- 2010-02-04 CN CN2010101128625A patent/CN101792103B/en not_active Expired - Fee Related
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Publication number | Publication date |
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CN101792103B (en) | 2012-07-18 |
ES2360930T3 (en) | 2011-06-10 |
ATE505261T1 (en) | 2011-04-15 |
DE102009007423A1 (en) | 2010-08-05 |
EP2216090A1 (en) | 2010-08-11 |
PL2216090T3 (en) | 2011-09-30 |
DE502010000012D1 (en) | 2011-05-26 |
DK2216090T3 (en) | 2011-07-11 |
CN101792103A (en) | 2010-08-04 |
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