EP0638365B1 - Method and device for separating fine-grained solids into two grain size fractions - Google Patents
Method and device for separating fine-grained solids into two grain size fractions Download PDFInfo
- Publication number
- EP0638365B1 EP0638365B1 EP94112005A EP94112005A EP0638365B1 EP 0638365 B1 EP0638365 B1 EP 0638365B1 EP 94112005 A EP94112005 A EP 94112005A EP 94112005 A EP94112005 A EP 94112005A EP 0638365 B1 EP0638365 B1 EP 0638365B1
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- EP
- European Patent Office
- Prior art keywords
- flow
- dispersion
- wheel
- deflector wheel
- fine
- 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.)
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- 239000007787 solid Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000006185 dispersion Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 19
- 239000007962 solid dispersion Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 5
- 239000011362 coarse particle Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
- B04C5/18—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations with auxiliary fluid assisting discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/60—Washing granular, powdered or lumpy materials; Wet separating by non-mechanical classifiers, e.g. slime tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
- B04B3/04—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
Definitions
- the invention relates to the separation of a fine grain in a liquid dispersed solid in a fine and a coarse. It concerns one procedure and one Device for performing this separation in the grain size range below about 50 microns, preferably below about 10 microns.
- hydrocyclones are preferably used, in which the Influence of centrifugal force, wall friction and drag force of a liquid on the Solid particles, this separation is achieved.
- EP 0 355 285 A2 discloses a device in which a fine-grained solid in one dripping liquid is dispersed and the dispersion in a sink flow with superimposed rotational flow is forced.
- the rotating working part used to separate the fine material consists of one Stack of cutting discs with free ones between the cutting discs Gaps.
- the rotating cutting disc stack is therefore loaded with coarse particle flows, whereby only a lower throughput of fine material flow through the cutting disc stack can be achieved.
- the invention is therefore based on the object of a method and an apparatus for Separation of a fine-grained solid into a fine material and a coarse material to be specified in economically a sharp separation, especially in the grain size range enable below about 10 microns.
- the fine-grained Solid dispersed in a drippable liquid and the dispersion in a defined Sink flow with superimposed, regardless of the sink flow generated Forced rotational flow.
- the ratio of doing so independently adjustable speeds of sink and rotational flow determines the Separation grain size or separation limit between fine and coarse goods, i.e. the particle size, for the centrifugal force generated by the rotation and that by the sink flow generated drag force of the liquid are in equilibrium, that is, with the same Probability of getting into the fine or coarse material.
- the method according to the invention can thereby be particularly simple realize that sink and rotational flow are rotating in one driven deflector wheel with flow from outside to inside parallel to its axis of rotation and flow channels forming blades are generated, the solid dispersion of the Deflector wheel is abandoned on the outer circumference.
- the one suitable for carrying out the method according to the invention Device consists essentially of a pressure-resistant housing with Connections for introducing the feed dispersion and that Discharge of fine and coarse material dispersion, at least one in Housing rotatably mounted and driven deflector wheel and one Feed pump for feeding the feed dispersion.
- Beneficial Embodiments of this device are in claims 5 to 12 shown.
- the deflector wheel is arranged in a closed housing, into which the solid to be classified and dispersed in a liquid - the feed dispersion - is conveyed with a feed pump via an inlet connection.
- the dispersion flows through the rotating deflector wheel from the outside in, whereby the solid is separated into fine and coarse material. Particles in which the drag force exerted by the flowing liquid is smaller than the centrifugal force induced by the rotation of the deflector wheel cannot get inside the wheel and are rejected. Particles where the drag force is greater than the centrifugal force enter the inside of the wheel with the liquid.
- This part of the dispersion thus contains the fine material fraction and leaves the housing of the separating device through a discharge connection which connects to the interior of the deflector wheel.
- the rejected particles leave the housing with the remaining part of the liquid as coarse material dispersion through a second discharge connection.
- the fine material dispersion must Flow through the wheel against the centrifugal force a relatively high Overcome pressure.
- This pressure depending on the operating state in the The order of 3 to 20 bar is achieved by the feed pump upset.
- the housing of the Separating device and also the bearing of the drive shaft for the Deflector wheel be designed pressure-resistant; for the latter is in the in most cases the use of a mechanical seal is required.
- the operating sizes that determine the size of the separation grain are Peripheral speed of the deflector wheel and the radial Flow velocity in its formed by blades Flow channels.
- the peripheral speed can be given Outside diameter of the deflector wheel solely based on its speed be set; the radial flow velocity results from the free flow cross section of the deflector wheel and the Volume flow of the fine material dispersion.
- This together with the Volume flow of the coarse material dispersion are determined by the inflow quantity of the Feed dispersion determined by the conveying capacity of the Feed pump is set. Because the fines dispersion is usually
- the volume flow is set to flow freely indirectly via the feed quantity and the division ratio of the Volume flows of fine and coarse material dispersion. The change of this Division ratio takes place in that the volume flow of the Coarse material dispersion is changed, e.g. by changing the Discharge cross-section or by metered pumping the Coarse material dispersion.
- the axis of rotation of the deflector wheel lies in the axis a rotationally symmetrical, e.g. cylindrical housing in which the Liquid and the solid dispersed therein without special Measures rotated evenly with the deflector wheel.
- a rotationally symmetrical e.g. cylindrical housing in which the Liquid and the solid dispersed therein without special Measures rotated evenly with the deflector wheel.
- the radial distance between the Inner wall of the container and the circumference of the deflector wheel are small maintained, a uniform flow against the deflector wheel is achieved over its entire length. Short circuit currents and backflow effects can be avoided effectively.
- Optimal Flow conditions are achieved when the radial distance between inner wall and wheel circumference less than 10% of the diameter of the Deflector wheel is.
- the termination for the feed dispersion can be above, below or be attached to the housing in the area of the deflector wheel, wherein a tangential junction with inflow in the direction of rotation of the Deflection wheel the pre-acceleration of liquid and solid favored.
- An additional pre-classification effect can be achieved if the connection for the feed dispersion with inflow in axial direction at the lower end of the housing and central to it is arranged. Coarse particles are thereby brought close to the Housing wall worn so that they no longer burden the deflector wheel, but are carried out directly.
- a longer flow path e.g. by changing from the connection cross-section to the housing cross-section Expanding, conical housing part can still have the pre-classification effect improve.
- the deflector wheel can be a cylindrical paddle wheel in a known manner be designed with a free interior. Which is in this interior however, forming potential vortex flow produces a high one Pressure loss, so that the use of such a deflector wheel only low speeds makes sense, i.e. for relatively rough separations with small throughputs.
- the flow can be reduced due to its rotationally symmetrical design and coaxial with the deflector wheel arranged moldings improve, the radially aligned blades of the deflector wheel from its circumference to the Extend molded body.
- the molded body can e.g. as cylinder, cone or truncated cone.
- Fig. 1 shows a schematic representation of an invention trained device with a cylindrical housing 1 to which the Storage 8 for receiving the deflector wheel 3 is flanged directly.
- the vertical-axis de-icing wheel 3 becomes the pulley 12 and Hollow shaft 9 driven their bearings with a shaft seal 6 against the interior of the housing 1 are sealed.
- What to separate, in a liquid dispersed feed is through port 2 in the Pumped housing 1, from where it enters the deflector 3. That through the separating action of the deflector wheel 3 separated fine material is combined with a part of the liquid as a fine dispersion through the Hollow shaft 9 discharged into the fixed fine material collector 10 and flows through connection 4 for further use.
- Fig. 2 shows a variant with several, horizontal-axis Deflector wheels 3, which are arranged in a common housing 1.
- Each deflector wheel 3 has its own (not shown here) Motor driven by pulley 12. This makes it possible to Set the speed of each deflector wheel 3 individually, so that from one feed dispersion also several at the same time differently composed fines dispersions are subtracted can.
- This variant is preferably used for high Throughputs at lower and the same for all deflector wheels To reach the separation limit.
- Fig. 3 is in place of the straight bottom of housing 1 (Fig. 1) funnel-shaped, tapered component 14 fastened, at its lowest point, port 2 for the inlet of the Feed dispersion flows.
- the connections 2 and 5 reversed their position.
- This training serves one To achieve pre-classification of the feed material, such that the rotating Deflector wheel 3 causes rotation of the introduced dispersion by the coarse particles before entering the deflector wheel 3 to the Interior bounding walls carried by component 14 and housing 1 and be braked there so that they no longer enter the deflector wheel 3 can occur, but carried out directly through the port 5 become.
- the quantity setting for the coarse material dispersion is made here by the slide 7 inserted directly into the connection 5.
- the bumpers 3 in Figures 1 to 3 consist essentially of two limiting disks connected with each other at an axial distance 15, 16, between which and parallel to the axis of rotation Blades 17 forming flow channels over the circumference of the disks are evenly distributed, being perpendicular or at an angle can be aligned to the scope.
- Through a central hole in the one limiting disk 15 is the fine material dispersion in the Hollow shaft 9 discharged.
- the through the outer edges of the blades 17th certain circumferential surface is a cylindrical surface. But it can also as in Fig. 4 as the largest diameter conical surface on the Boundary disk 15 to be formed with the central bore a more even flow through the deflector wheel 3, especially in to reach free interior.
- the deflector wheels 3 of FIGS. 6 and 7 in turn have a cylindrical circumferential surface, the blades 17, which are oriented radially here, however, extending up to the axis of rotation of the deflector wheel 3. In this version, there is no potential vortex, but one Solid-state vortex flow in deflector wheel 3.
- flat annular disks 19 are also attached at the same mutual spacing, which extend radially outward from the outer circumference of the deflector wheel 3 and serve to pre-accelerate the feed material dispersion flowing in from the outside of the deflector wheel 3.
- FIGS. 8 and 9 show a deflector wheel 3 in longitudinal and cross-section with coaxial shaped body in the form of a cylinder, which is part of the Hollow shaft 9 is formed.
- the molded body has a gap opening 20th in the length of the axial extension of the blades 17 through which the Fine material dispersion can enter the hollow shaft 9, from where it over the fines collector 10 and connection 4 ( Figures 1 to 3) from the Separating device is removed.
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Centrifugal Separators (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
Description
Die Erfindung bezieht sich auf die Trennung eines feinkörnig in einer Flüssigkeit dispergierten Feststoffs in ein Feingut und ein Grobgut. Sie betrifft ein Verfahren und eine Vorrichtung zur Durchführung dieser Trennung im Korngrößenbereich unterhalb von etwa 50 µm, vorzugsweise unterhalb von etwa 10 µm.The invention relates to the separation of a fine grain in a liquid dispersed solid in a fine and a coarse. It concerns one procedure and one Device for performing this separation in the grain size range below about 50 microns, preferably below about 10 microns.
Zur Lösung der Aufgabe, einen feinkörnigen Feststoff mit einer Kornverteilung von 0 bis maximal 50 µm in ein Feingut und ein Grobgut bei einer Trenngrenze unterhalb von etwa 10 µm zu trennen, werden bevorzugt Hydrozyklone eingesetzt, in denen durch die Einwirkung von Fliehkraft, Wandreibung und Schleppkraft einer Flüssigkeit auf die Feststoffpartikel, diese Trennung erzielt wird. Infolge der systembedingten verwickelten Strömungsverhältnisse in einem Hydrozyklon ist jedoch eine scharfe Trennung bei einer bestimmten Korngröße nicht möglich, so daß der Überschneidungsbereich, d.h. der Korngrößenbereich, der sowohl im Feingut als auch im Grobgut enthalten ist, meist unerwünscht groß ist.To solve the problem, a fine-grained solid with a grain size of 0 to a maximum of 50 µm in a fine material and a coarse material with a separation limit below about To separate 10 µm, hydrocyclones are preferably used, in which the Influence of centrifugal force, wall friction and drag force of a liquid on the Solid particles, this separation is achieved. As a result of the systemic entangled Flow conditions in a hydrocyclone, however, are a sharp separation in one certain grain size is not possible, so that the overlap area, i.e. of the Grain size range, which is contained in both fine and coarse material, mostly is undesirably large.
Die EP 0 355 285 A2 offenbart eine Vorrichtung, bei der ein feinkörniger Feststoff in einer tropfbaren Flüssigkeit dispergiert ist und die Dispersion in eine Senkenströmung mit überlagerter Rotationsströmung gezwungen ist.EP 0 355 285 A2 discloses a device in which a fine-grained solid in one dripping liquid is dispersed and the dispersion in a sink flow with superimposed rotational flow is forced.
Das zur Abtrennung des Feingutes dienende, rotierende Arbeitsteil besteht aus einem Stapel von Trennscheiben mit zwischen den Trennscheiben befindlichen freien Zwischenräumen.The rotating working part used to separate the fine material consists of one Stack of cutting discs with free ones between the cutting discs Gaps.
Aufgrund der sich dort ausbildenden Potentialwirbelströmung führt eine Erhöhung der Senkenströmung zwangsläufig zu einer Vergrößerung der Rotationsgeschwindigkeit und damit zu einer Erhöhung der Rotationsströmung. Die Senkenströmung ist somit nicht unabhängig von der Rotationsströmung einstellbar. Eine exakte und vorhersehbare Einstellung und Variation der Trenngrenze ist hier aufgrund der Abhängigkeit der Verfahrensparameter nicht möglich. Due to the potential vortex flow developing there, an increase in the Sink flow inevitably increases the speed of rotation and thus an increase in the rotational flow. The sink flow is therefore not adjustable independently of the rotational flow. An exact and predictable Setting and variation of the separation limit is due to the dependence of the Process parameters not possible.
Außerdem ist es von Nachteil, daß grobe Teilchen zunächst in das Innere des rotierenden Trennscheibenstapels transportiert werden. Am Umfangsbereich des Trennscheibenstapels überwiegt nämlich zunächst die nach innen gerichtete Kraftkomponente aus der Senkenströmung auf die Teilchen und erst bei geringerem Radius innerhalb des Trennscheibenstapels erhöht sich die nach außen gerichtete Kraftkomponente aus der erhöhten Umfangsgeschwindigkeit auf die Teilchen, so daß die groben Partikel aus ihrer nach innen führenden Bewegungsrichtung umkehren und sich sodann nach außen bewegen.In addition, it is disadvantageous that coarse particles first enter the interior of the rotating Cutting disc stack are transported. At the peripheral area of the cutting disc stack First of all, the inward force component outweighs the Sink flow onto the particles and only with a smaller radius within the Cutting disc stack increases the outward force component from the increased peripheral speed on the particles so that the coarse particles from their Reverse the inward direction of movement and then move outwards.
Der rotierende Trennscheibenstapel wird daher mit groben Partikelströmungen belastet, wodurch nur ein geringerer Durchsatz an Feingutströmung durch den Trennscheibenstapel erzielt werden kann.The rotating cutting disc stack is therefore loaded with coarse particle flows, whereby only a lower throughput of fine material flow through the cutting disc stack can be achieved.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Trennung eines feinkörnigen Feststoffes in ein Feingut und ein Grobgut anzugeben, die in wirtschaftlicher Weise eine scharfe Trennung insbesondere im Korngrößenbereich unterhalb von etwa 10 µm ermöglichen. Zur Lösung dieser Aufgabe wird der feinkörnige Feststoff in einer tropfbaren Flüssigkeit dispergiert und die Dispersion in eine definierte Senkenströmung mit überlagerter, unabhängig von der Senkenströmung erzeugter Rotationsströmung gezwungen. Das Verhältnis der dabei unabhängig voneinander einstellbaren Geschwindigkeiten von Senken- und Rotationsströmung bestimmt die Trennkorngröße bzw. Trenngrenze zwischen Feingut und Grobgut, d.h. die Partikelgröße, für die die durch die Rotation erzeugte Fliehkraft und die durch die Senkenströmung erzeugte Schleppkraft der Flüssigkeit im Gleichgewicht sind, die also mit gleicher Wahrscheinlichkeit in das Feingut oder das Grobgut gelangt. The invention is therefore based on the object of a method and an apparatus for Separation of a fine-grained solid into a fine material and a coarse material to be specified in economically a sharp separation, especially in the grain size range enable below about 10 microns. To solve this problem, the fine-grained Solid dispersed in a drippable liquid and the dispersion in a defined Sink flow with superimposed, regardless of the sink flow generated Forced rotational flow. The ratio of doing so independently adjustable speeds of sink and rotational flow determines the Separation grain size or separation limit between fine and coarse goods, i.e. the particle size, for the centrifugal force generated by the rotation and that by the sink flow generated drag force of the liquid are in equilibrium, that is, with the same Probability of getting into the fine or coarse material.
Besonders einfach läßt sich das erfindungsgemäße Verfahren dadurch realisieren, daß Senken- und Rotationsströmung in einem rotierend angetriebenen, von außen nach innen durchströmten Abweiserad mit parallel zu seiner Drehachse verlaufenden und Strömungskanäle bildenden Schaufeln erzeugt werden, wobei die Feststoffdispersion dem Abweiserad am Außenumfang aufgegeben wird.The method according to the invention can thereby be particularly simple realize that sink and rotational flow are rotating in one driven deflector wheel with flow from outside to inside parallel to its axis of rotation and flow channels forming blades are generated, the solid dispersion of the Deflector wheel is abandoned on the outer circumference.
Die zur Durchführung des erfindungsgemäßen Verfahrens geeignete
Vorrichtung besteht im wesentlichen aus einem druckfesten Gehäuse mit
Anschlüssen für das Einbringen der Aufgabegutdispersion und das
Austragen von Feingut- und Grobgutdispersion, mindestens einem im
Gehäuse drehbar gelagerten und angetriebenen Abweiserad und einer
Speisepumpe für das Einbringen der Aufgabegutdispersion. Vorteilhafte
Ausgestaltungen dieser Vorrichtung sind in den Ansprüchen 5 bis 12
dargestellt.The one suitable for carrying out the method according to the invention
Device consists essentially of a pressure-resistant housing with
Connections for introducing the feed dispersion and that
Discharge of fine and coarse material dispersion, at least one in
Housing rotatably mounted and driven deflector wheel and one
Feed pump for feeding the feed dispersion. Beneficial
Embodiments of this device are in
Die folgenden Ausführungen beschreiben die Erfindung im einzelnen:
Das Abweiserad ist in einem geschlossenen Gehäuse angeordnet, in das
der zu klassierende, in einer Flüssigkeit dispergierte Feststoff - die
Aufgabegutdispersion - mit einer Speisepumpe über einen Zulaufanschluß
gefördert wird. Die Dispersion durchströmt das rotierende Abweiserad
von außen nach innen, wobei die Trennung des Feststoffs in Feingut und
Grobgut stattfindet. Partikel, bei denen die durch die strömende
Flüssigkeit ausgeübte Schleppkraft kleiner ist als die durch die
Rotation des Abweiserades induzierte Fliehkraft, können nicht in das
Innere des Rades gelangen und werden abgewiesen. Partikel, bei denen
die Schleppkraft größer ist als die Fliehkraft, gelangen mit der
Flüssigkeit in das Innere des Rades. Dieser Teil der Dispersion
enthält somit die Feingutfraktion und verläßt das Gehäuse der
Trennvorrichtung durch einen Austragsanschluß, der sich an den
Innenraum des Abweiserades anschließt. Durch einen zweiten
Austragsanschluß verlassen die abgewiesenen Partikel mit dem
restlichen Teil der Flüssigkeit als Grobgutdispersion das Gehäuse. The following statements describe the invention in detail:
The deflector wheel is arranged in a closed housing, into which the solid to be classified and dispersed in a liquid - the feed dispersion - is conveyed with a feed pump via an inlet connection. The dispersion flows through the rotating deflector wheel from the outside in, whereby the solid is separated into fine and coarse material. Particles in which the drag force exerted by the flowing liquid is smaller than the centrifugal force induced by the rotation of the deflector wheel cannot get inside the wheel and are rejected. Particles where the drag force is greater than the centrifugal force enter the inside of the wheel with the liquid. This part of the dispersion thus contains the fine material fraction and leaves the housing of the separating device through a discharge connection which connects to the interior of the deflector wheel. The rejected particles leave the housing with the remaining part of the liquid as coarse material dispersion through a second discharge connection.
Durch die Rotation des Abweiserades muß die Feingutdispersion beim Durchströmen des Rades entgegen der Fliehkraft einen relativ hohen Druck überwinden. Dieser Druck, der je nach Betriebszustand in der Größenordnung von 3 bis 20 bar liegt, wird durch die Speisepumpe aufgebracht. Dieser Belastung entsprechend muß das Gehäuse der Trennvorrichtung und ebenso die Lagerung der Antriebswelle für das Abweiserad druckfest ausgeführt sein; für letztere ist dabei in den meisten Fällen die Verwendung einer Gleitringdichtung erforderlich.Due to the rotation of the deflector wheel, the fine material dispersion must Flow through the wheel against the centrifugal force a relatively high Overcome pressure. This pressure, depending on the operating state in the The order of 3 to 20 bar is achieved by the feed pump upset. The housing of the Separating device and also the bearing of the drive shaft for the Deflector wheel be designed pressure-resistant; for the latter is in the in most cases the use of a mechanical seal is required.
Die die Trennkorngröße bestimmenden Betriebsgrößen sind die Umfangsgeschwindigkeit des Abweiserades und die radiale Strömungsgeschwindigkeit in dessen durch Schaufeln gebildeten Strömungskanälen. Die Umfangsgeschwindigkeit kann bei gegebenem Außendurchmesser des Abweiserades allein über seine Drehzahl eingestellt werden; die radiale Strömungsgeschwindigkeit ergibt sich aus dem freien Strömungsquerschnitt des Abweiserades und dem Volumenstrom der Feingutdispersion. Dieser zusammen mit dem Volumenstrom der Grobgutdispersion werden durch die Zulaufmenge der Aufgabegutdispersion bestimmt, die über die Förderleistung der Speisepumpe eingestellt wird. Da die Feingutdispersion für gewöhnlich frei auslaufen soll, erfolgt die Einstellung ihres Volumenstroms indirekt über die Zulaufmenge und das Teilungsverhältnis der Volumenströme von Feingut- und Grobgutdispersion. Die Änderung dieses Teilungsverhältnisses erfolgt dadurch, daß der Volumenstrom der Grobgutdispersion verändert wird, z.B. durch Ändern des Austragsquerschnittes oder durch dosiertes Abpumpen der Grobgutdispersion.The operating sizes that determine the size of the separation grain are Peripheral speed of the deflector wheel and the radial Flow velocity in its formed by blades Flow channels. The peripheral speed can be given Outside diameter of the deflector wheel solely based on its speed be set; the radial flow velocity results from the free flow cross section of the deflector wheel and the Volume flow of the fine material dispersion. This together with the Volume flow of the coarse material dispersion are determined by the inflow quantity of the Feed dispersion determined by the conveying capacity of the Feed pump is set. Because the fines dispersion is usually The volume flow is set to flow freely indirectly via the feed quantity and the division ratio of the Volume flows of fine and coarse material dispersion. The change of this Division ratio takes place in that the volume flow of the Coarse material dispersion is changed, e.g. by changing the Discharge cross-section or by metered pumping the Coarse material dispersion.
Die Drehachse des Abweiserades liegt im einfachsten Fall in der Achse eines rotationssymmetrischen, z.B. zylindrischen Gehäuses, in dem die Flüssigkeit und der darin dispergierte Feststoff ohne besondere Maßnahmen gleichmäßig mit dem Abweiserad mitrotiert. Wird insbesondre bei einem zylindrischen Behälter der radiale Abstand zwischen der Innenwand des Behälters und dem Umfang des Abweiserades klein gehalten, erreicht man eine gleichmäßige Anströmung des Abweiserades über dessen gesamte Länge. Kurzschlußströmungen und Rückströmeffekte können so wirkungsvoll vermieden werden. Optimale Strömungsverhältnisse werden erreicht, wenn der radiale Abstand zwischen Innenwand und Radumfang weniger als 10 % des Durchmessers des Abweiserades beträgt.In the simplest case, the axis of rotation of the deflector wheel lies in the axis a rotationally symmetrical, e.g. cylindrical housing in which the Liquid and the solid dispersed therein without special Measures rotated evenly with the deflector wheel. In particular in the case of a cylindrical container, the radial distance between the Inner wall of the container and the circumference of the deflector wheel are small maintained, a uniform flow against the deflector wheel is achieved over its entire length. Short circuit currents and backflow effects can be avoided effectively. Optimal Flow conditions are achieved when the radial distance between inner wall and wheel circumference less than 10% of the diameter of the Deflector wheel is.
In schwierigeren Fällen oder bei Einsatz mehrerer Abweiseräder im gemeinsamen Gehäuse, wenn sehr feine Trennungen und hohe Durchsatzleistungen gefordert werden, kann es von Vorteil sein, die Abweiseräder mit besonderen Einrichtungen zu versehen, z.B. mit rotierenden Ringscheiben, die eine gleichmäßige Vorbeschleunigung von Flüssigkeit und Feststoff bereits im Außenbereich der Abweiseräder bewirken.In more difficult cases or when using multiple bumpers in the common housing when very fine separations and high When throughput rates are required, it can be beneficial To provide bumpers with special facilities, e.g. With rotating washers, which provide a uniform pre-acceleration of Liquid and solid already in the outer area of the deflector wheels cause.
Der Abschluß für die Aufgabegutdispersion kann oberhalb, unterhalb oder im Bereich des Abweiserades am Gehäuse angebracht sein, wobei eine tangentiale Einmündung mit Einströmung in Drehrichtung des Abweiserades die Vorbeschleunigung von Flüssigkeit und Feststoff begünstigt. Ein zusätzlicher Vorklassiereffekt läßt sich erreichen, wenn der Anschluß für die Aufgabegutdispersion mit Einströmung in axialer Richtung am unteren Ende des Gehäuses und zentral dazu angeordnet wird. Grobe Partikel werden dadurch in die Nähe der Gehäusewand getragen, so daß sie das Abweiserad nicht mehr belasten, sondern direkt ausgetragen werden. Ein längerer Strömungsweg, z.B. durch ein sich vom Anschlußquerschnitt auf den Gehäusequerschnitt erweiterndes, konisches Gehäuseteil, kann den Vorklassiereffekt noch verbessern.The termination for the feed dispersion can be above, below or be attached to the housing in the area of the deflector wheel, wherein a tangential junction with inflow in the direction of rotation of the Deflection wheel the pre-acceleration of liquid and solid favored. An additional pre-classification effect can be achieved if the connection for the feed dispersion with inflow in axial direction at the lower end of the housing and central to it is arranged. Coarse particles are thereby brought close to the Housing wall worn so that they no longer burden the deflector wheel, but are carried out directly. A longer flow path, e.g. by changing from the connection cross-section to the housing cross-section Expanding, conical housing part can still have the pre-classification effect improve.
Das Abweiserad kann in bekannter Weise als zylindrisches Schaufelrad mit freiem Innenraum ausgeführt sein. Die sich in diesem Innenraum ausbildende Potentialwirbelströmung erzeugt jedoch einen hohen Druckverlust, so daß der Einsatz eines solchen Abweiserades nur bei niedrigen Drehzahlen sinnvoll ist, d.h. für relativ grobe Trennungen bei kleinen Durchsätzen. The deflector wheel can be a cylindrical paddle wheel in a known manner be designed with a free interior. Which is in this interior however, forming potential vortex flow produces a high one Pressure loss, so that the use of such a deflector wheel only low speeds makes sense, i.e. for relatively rough separations with small throughputs.
Mit einem Abweiserad, bei dem sich radial ausgerichtete Schaufeln vom Umfang bis in den Bereich der Drehachse des Abweiserades erstrecken, kann die Ausbildung der Potentialwirbelströmung verhindert werden. Der Trennvorgang erfolgt nun in einem sogenannten Festkörperwirbel, dessen höchste Umfangsgeschwindigkeit im Gegensatz zur Potentialwirbelströmung an der Außenkante der Schaufeln liegt. Der Druckverlust ist erheblich geringer, dabei unabhängig vom Volumenstrom und ausschließlich von der Drehzahl des Abweiserades abhängig. In überraschender Weise wurde gefunden, daß mit einem Abweiserad mit Festkörperwirbel feinere Trennungen mit höherem Feingutauszug bei gleichzeitig größeren Durchsatzleistungen als bei einem Abweiserad mit Potentialwirbel erreicht werden können.With a deflector wheel, in which radially aligned blades from Extend circumference into the area of the axis of rotation of the deflector wheel, the formation of the potential vortex flow can be prevented. Of the Separation process now takes place in a so-called solid vortex, whose highest peripheral speed in contrast to Potential vortex flow is on the outer edge of the blades. Of the Pressure loss is considerably lower, regardless of the volume flow and only depends on the speed of the deflector wheel. In Surprisingly, it was found that with a deflector Solid vortex finer separations with higher fines extraction at the same time greater throughputs than with a deflector wheel Potential eddies can be achieved.
Für eine optimale Trennwirkung eines Abweiserades ist eine möglichst vollständige Vorbeschleunigung von Flüssigkeit und Feststoff vor dem Eintritt in die Schaufelkanäle des Abweiserades erforderlich; dies gilt insbesondere bei Anwendung eines Abweiserades mit Festkörperwirbel. In der Regel wird durch eine geeignete Anordnung des Anschlusses für die Aufgabegutdispersion eine meist ausreichende Vorbeschleunigung erreicht. Wo dies nicht der Fall ist, helfen z.B. fest mit dem Abweiserad verbundene, sich vom Umfangsbereich des Abweiserades radial nach außen erstreckende Ringscheiben, die mit axialem Abstand zueinander und koaxial zur Drehachse des Abweiserades angeordnet sind. Diese Ringscheiben bewirken durch ihren Mitnahmeeffekt eine gleichmäßige und vollständige Vorbeschleunigung bis zum Eintritt in die Schaufelkanäle.For an optimal separation effect of a deflector wheel, one is possible complete pre-acceleration of liquid and solid before Entry into the deflector wheel's blade channels required; this applies especially when using a deflector wheel Solid vortex. As a rule, by an appropriate arrangement the connection for the feed dispersion is usually sufficient Pre-acceleration reached. Where this is not the case, e.g. firmly connected to the deflector, from the peripheral area of the Deflection wheel radially outwardly extending washers, with axial distance from each other and coaxial to the axis of rotation of the deflector wheel are arranged. These ring discs cause by their Driving effect an even and complete pre-acceleration until entry into the blade channels.
Neben der Vorbeschleunigung ist auch eine gleichmäßige Durchströmung des Abweiserades für eine optimale Trennwirkung bestimmend. Vor allem bei einem Abweiserad mit Festkörperwirbel läßt sich die Durchströmung durch rotationssymmetrisch ausgebildete und koaxial zum Abweiserad angeordnete Formkörper verbessern, wobei sich die radial ausgerichteten Schaufeln des Abweiserades von dessen Umfang bis zu dem Formkörper erstrecken. Der Formkörper kann z.B. als Zylinder, Kegel oder Kegelstumpf ausgebildet sein. In addition to the pre-acceleration, there is also an even flow determining the deflector wheel for an optimal separation effect. Especially in the case of a deflector wheel with a solid-state vortex, the flow can be reduced due to its rotationally symmetrical design and coaxial with the deflector wheel arranged moldings improve, the radially aligned blades of the deflector wheel from its circumference to the Extend molded body. The molded body can e.g. as cylinder, cone or truncated cone.
Bei der Klassierung eines in einer Flüssigkeit dispergierten Feststoffes besteht in den meisten Fällen keine Gefahr, daß sich der Feststoff an den von der Dispersion berührten Flächen ansetzt. Daher ist es möglich, bei fliegender Lagerung des Abweiserades die Antriebswelle, bei zweiseitiger Lagerung eine Achse für den Feingutaustrag rohrförmig auszubilden. Eine aufwendige Abdichtung des Feingutaustrittes gegen den Innenraum des Gehäuses kann dann entfallen. Die ausgetragene Feingutdispersion wird in einem Sammler aufgefangen und kann dann frei abfließen. Eine vorteilhafte Ausbildung ergibt sich dabei, wenn der oben erwähnte Formkörper als Teil der hohlen Antriebswelle oder Achse ausgebildet ist und für jeden von den Schaufeln des Abweiserades gebildeten Strömungskanal zumindest eine Öffnung aufweist, durch die Flüssigkeit und Feingut in die hohle Welle oder Achse eintreten kann.When classifying one dispersed in a liquid Solid matter there is in most cases no risk that the Solid attaches to the surfaces touched by the dispersion. Therefore it is possible, if the deflector wheel is stored on the fly Drive shaft, with two-sided bearing an axis for the Form fine material discharge tubular. An elaborate sealing of the Fines exit against the interior of the housing can then omitted. The fine material dispersion is carried out in a collector caught and can then drain freely. An advantageous education arises if the above-mentioned molded part as part of the hollow drive shaft or axle is formed and for each of the Blades of the deflection wheel formed at least one flow channel Has opening through which liquid and fines into the hollow shaft or axis can enter.
Ausführungsbeispiele sind in den Zeichnungen dargestellt. Funktionell gleiche Bauelemente haben in allen Zeichnungen die gleiche Positionsnummer.Exemplary embodiments are shown in the drawings. Functional The same components have the same in all drawings Position number.
Fig. 1 zeigt in schematischer Darstellung eine erfindungsgemäß
ausgebildete Vorrichtung mit zylindrischem Gehäuse 1, an das die
Lagerung 8 zur Aufnahme des Abweiserades 3 direkt angeflanscht ist.
Das vertikalachsige Abeiserad 3 wird der Riemenscheibe 12 und
Hohlwelle 9 angetrieben deren Lager mit einer Wellendichtung 6 gegen
den Innenraum des Gehäuses 1 abgedichtet sind. Das zu trennende, in
einer Flüssigkeit dispergierte Aufgabegut wird durch Anschluß 2 in das
Gehäuse 1 gepumpt, von wo es in das Abweiserad 3 gelangt. Das durch
die Trennwirkung des Abweiserades 3 abgetrennte Feingut wird zusammen
mit einem Teil der Flüssigkeit als Feingutdispersion durch die
Hohlwelle 9 in den feststehenden Feingutsammler 10 ausgetragen und
fließt durch Anschluß 4 zur Weiterverwendung ab. Das vom Abweiserad 3
abgewiesene Grobgut strömt mit der restlichen Flüssigkeit durch die im
Boden des Gehäuses 1 zentral angeordnete Öffnung 11 in den
Grobgutsammler 13 ab, den es durch Anschluß 5 als Grobgutdispersion
verläßt. Die Menge der abfließenden Grobgutdispersion kann durch
Ändern des Querschnitts der Öffnung 11 gesteuert werden; dazu dient
hier der axial verstellbare Schieber 7. Fig. 1 shows a schematic representation of an invention
trained device with a
Fig. 2 zeigt eine Variante mit mehreren, horizontalachsigen
Abweiserädern 3, die in einem gemeinsamen Gehäuse 1 angeordnet sind.
Jedes Abweiserad 3 wird durch einen eigenen (hier nicht dargestellten)
Motor über Riemenscheibe 12 angetrieben. Damit ist es möglich, die
Drehzahl eines jeden Abweiserades 3 individuell einzustellen, so daß
aus einer Aufgabegutdispersion gleichzeitig auch mehrere
unterschiedlich zusammengesetzte Feingutdispersionen abgezogen werden
können. Vorzugsweise wird diese Variante dazu verwendet, hohe
Durchsätze bei niedriger und bei allen Abweiserädern gleicher
Trenngrenze zu erreichen.Fig. 2 shows a variant with several, horizontal-
In Fig. 3 ist anstelle des geraden Bodens von Gehäuse 1 (Fig. 1) ein
trichterförmiges, sich nach unten verjüngendes Bauteil 14 befestigt,
an dessen tiefster Stelle der Anschluß 2 für den Zulauf der
Aufgabegutdispersion mündet. Gegenüber Fig. 1 sind die Anschlüsse 2
und 5 in ihrer Lage vertauscht. Diese Ausbildung dient dazu, eine
Vorklassierung des Aufgabegutes zu erreichen, derart, daß das drehende
Abweiserad 3 eine Rotation der eingebrachten Dispersion bewirkt, durch
die grobe Partikel noch vor Eintritt in das Abweiserad 3 an die den
Innenraum begrenzenden Wände von Bauteil 14 und Gehäuse 1 getragen und
dort abgebremst werden, so daß sie nicht mehr in das Abweiserad 3
eintreten können, sondern gleich durch den Anschluß 5 ausgetragen
werden. Die Mengeneinstellung für die Grobgutdispersion erfolgt hier
durch den direkt in den Anschluß 5 eingesetzten Schieber 7.In Fig. 3 is in place of the straight bottom of housing 1 (Fig. 1)
funnel-shaped, tapered
Die Abweiseräder 3 in den Figuren 1 bis 3 bestehen im wesentlichen aus
zwei, mit axialem Abstand miteinander verbundenen Begrenzungsscheiben
15, 16, zwischen denen parallel zur Drehachse verlaufende und
Strömungskanäle bildende Schaufeln 17 über den Umfang der Scheiben
gleichmäßig verteilt sind, wobei sie senkrecht oder unter einem Winkel
zum Umfang ausgerichtet sein können. Durch eine zentrale Bohrung in
der einen Begrenzungsscheibe 15 wird die Feingutdispersion in die
Hohlwelle 9 ausgetragen. Die durch die Außenkanten der Schaufeln 17
bestimmte Umfangsfläche ist eine Zylinderfläche. Sie kann aber auch
wie in Fig. 4 als Kegelfläche mit größtem Durchmesser an der
Begrenzungsscheibe 15 mit der zentralen Bohrung ausgebildet sein, um
eine gleichmäßigere Durchströmung des Abweiserades 3 vor allem im
freien Innenraum zu erreichen.The
Die gleiche Aufgabe erfüllt in Fig. 5 der konzentrisch in das
Abweiserad 3 eingesetzte und an der Begrenzungsscheibe 16 befestigte
kegelförmige Formkörper 18.The same task is performed in Fig. 5 concentrically in the
Die Abweiseräder 3 der Figuren 6 und 7 haben wiederum eine
zylindrische Umfangsfläche, wobei sich die hier radial ausgerichteten
Schaufeln 17 jedoch bis zur Drehachse des Abweiserades 3 erstrecken.
Bei dieser Ausführung bildet sich keine Potentialwirbel-, sondern eine
Festkörperwirbelströmung im Abweiserad 3 aus. Am Abweiserad 3 der Fig.
7 sind außerdem noch ebene Ringscheiben 19 mit gleichem gegenseitigen
Abstand befestigt, die sich vom Außenumfang des Abweiserades 3 radial
nach außen erstrecken und zur Vorbeschleunigung der von außen dem
Abweiserad 3 zuströmenden Aufgabegutdispersion dienen.The
Solid-state vortex flow in
Die Figuren 8 und 9 zeigen in Längs- und Ouerschnitt ein Abweiserad 3
mit koaxialem Formkörper in Form eines Zylinders, der als Teil der
Hohlwelle 9 ausgebildet ist. Für jeden von zwei benachbarten Schaufeln
17 gebildeten Strömungskanal weist der Formkörper eine Spaltöffnung 20
in Länge der axialen Erstreckung der Schaufeln 17, durch die die
Feingutdispersion in die Hohlwelle 9 eintreten kann, von wo sie über
den Feingutsammler 10 und Anschluß 4 (Figuren 1 bis 3) aus der
Trennvorrichtung abgeführt wird.FIGS. 8 and 9 show a
Claims (12)
- Process to separate a fine-grained solid dispersed in a liquid into a fine fraction and a coarse fraction whereby the coarse material is conveyed to the periphery in a rotating flow field and the fine fraction is conveyed to the centre in a sink flow, characterised in that the dispersion is forced into a defined sink flow with superimposed rotational flow generated independent of the sink flow, and the cut point between the fines and the coarse is set by selecting the relationship between the speed of the sink flow and that of the rotational flow.
- Process according to Claim 1, characterised in that to generate the sink flow, the dispersion is pumped to flow from the outside periphery to the centre of a deflector wheel equipped with flow-channel-forming vanes which run parallel to the wheel's rotational axis and that to generate the rotational flow, the deflector wheel is driven to rotate.
- Device to carry out the process according to Claim 1 or 2, comprising a pressure-proof housing (1) with sockets for introducing the feed dispersion (2) and for discharging both the fine dispersion (4) and coarse dispersion (5), with at least one defector wheel (3) arranged to rotate within the housing (1) equipped with radially oriented vanes as well as a feed pump for introducing the feed dispersion (2).
- Device according to Claim 3, characterised in that the housing (1) is designed as a rotationally symmetrical vessel.
- Device according to Claim 3 with a cylindrical vessel, characterised in that the radial distance between the inside wall of the vessel and the periphery of the deflector wheel is less than 10% of the diameter of the deflector wheel.
- Device according to Claim 4 or 5, characterised in that the socket for the coarse dispersion (5) is located at the centre of the bottom end of the housing (1).
- Device according to Claim 4 or 5, characterised in that the socket for the feed dispersion (2) is located at the centre of the bottom end of the housing (1).
- Device according to one of the Claims 3 - 7, characterised in that the discharge socket for the coarse dispersion (5) is adjustable in diameter.
- Device according to one of the Claims 3 - 7, characterised in that a suction pump with adjustable flow rate is located at the socket for the coarse dispersion (5).
- Device according to one of the Claims 3 - 7, characterised in that the vanes (17) of the deflector wheel (3) are radially oriented and extend from the periphery into the area of the rotational axis of the deflector wheel (3).
- Device according to one of the Claims 3 - 7, characterised in that the vanes (17) of the deflector wheel (3) are radially oriented and extend from the wheel's periphery to a shaped insert (18) which is designed to be rotationally symmetrical and which is arranged coaxially to the defector wheel (3).
- Device according to Claim 11, characterised in that the shaped insert (18) is an integral part of the hollow drive shaft (9) of the deflector wheel (3) and, for each of the flow channels formed by the vanes of the deflector wheel, has at least one aperture (20) to permit the fines to discharge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4326605A DE4326605A1 (en) | 1993-08-07 | 1993-08-07 | Method and device for separating a fine-grained solid into two grain fractions |
| DE4326605 | 1993-08-07 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| EP0638365A2 EP0638365A2 (en) | 1995-02-15 |
| EP0638365A3 EP0638365A3 (en) | 1995-09-13 |
| EP0638365B1 true EP0638365B1 (en) | 1999-05-26 |
| EP0638365B2 EP0638365B2 (en) | 2003-11-26 |
Family
ID=6494711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94112005A Expired - Lifetime EP0638365B2 (en) | 1993-08-07 | 1994-08-01 | Method and device for separating fine-grained solids into two grain size fractions |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5894935A (en) |
| EP (1) | EP0638365B2 (en) |
| JP (1) | JP2752585B2 (en) |
| KR (1) | KR0148400B1 (en) |
| CN (1) | CN1056787C (en) |
| AT (1) | ATE180420T1 (en) |
| DE (2) | DE4326605A1 (en) |
| ES (1) | ES2134296T3 (en) |
| TW (1) | TW259722B (en) |
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| DE10106638A1 (en) * | 2001-02-12 | 2002-09-05 | Tuhh Tech Gmbh | Continuous wet centrifuge for classification and counter-flow washing, includes fluidized bed zone and internal chambers with coarse and fine materials extraction |
| US6811031B1 (en) * | 2002-05-02 | 2004-11-02 | E. Verl Adams | Method and device for separating ore |
| US7488448B2 (en) * | 2004-03-01 | 2009-02-10 | Indian Wells Medical, Inc. | Method and apparatus for removal of gas bubbles from blood |
| KR100590848B1 (en) * | 2004-11-29 | 2006-06-19 | 한국기계연구원 | Method for separating particle using rotation-type screen and equipment thereof |
| US8070965B2 (en) * | 2007-04-18 | 2011-12-06 | Tarves Robert J Jun | Dual walled dynamic phase separator |
| US8397918B2 (en) * | 2008-09-28 | 2013-03-19 | Keith A. Langenbeck | Multiple flat disc type pump and hydrocyclone |
| JP5519982B2 (en) * | 2009-09-17 | 2014-06-11 | 正裕 岩永 | Two-phase fluid separation apparatus and method |
| JP5999682B2 (en) * | 2012-03-23 | 2016-09-28 | 学校法人幾徳学園 | Apparatus and method for recovering fluid with low concentration of particle component from solid-liquid two-phase fluid |
| RU2535322C1 (en) * | 2013-08-13 | 2014-12-10 | Федеральное Государственное Бюджетное Учреждение Науки Институт Химии И Химической Технологии Сибирского Отделения Российской Академии Наук (Иххт Со Ран) | Hydraulic separator |
| DE102014117191B3 (en) * | 2014-11-24 | 2016-05-12 | Netzsch-Feinmahltechnik Gmbh | Method for regulating the separating action of a separating device and separating device |
| DE102015115822A1 (en) * | 2015-09-18 | 2017-03-23 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method and device for separating particles of a certain size from a suspension |
| CN107123354B (en) * | 2017-05-21 | 2019-03-19 | 谭淞文 | Sort inhalator, respiratory tract and the lung model integration of equipments of flower-shape particulate carrier |
| CN109056464A (en) * | 2018-07-10 | 2018-12-21 | 黄山路之梦交通工程有限责任公司 | A kind of pretreatment mechanism of bitumen recovery |
| DE102018132155B3 (en) * | 2018-12-13 | 2019-12-12 | Netzsch-Feinmahltechnik Gmbh | FLOWERS WITH SPECIAL FAN WHEEL |
| FI128719B (en) * | 2019-05-02 | 2020-10-30 | Andritz Oy | A reject chamber of a centrifugal cleaner and a centrifugal cleaner |
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| US2996187A (en) * | 1961-08-15 | payne | ||
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-
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- 1993-08-07 DE DE4326605A patent/DE4326605A1/en not_active Withdrawn
-
1994
- 1994-07-30 TW TW083106983A patent/TW259722B/zh active
- 1994-08-01 DE DE59408302T patent/DE59408302D1/en not_active Expired - Lifetime
- 1994-08-01 AT AT94112005T patent/ATE180420T1/en not_active IP Right Cessation
- 1994-08-01 EP EP94112005A patent/EP0638365B2/en not_active Expired - Lifetime
- 1994-08-01 ES ES94112005T patent/ES2134296T3/en not_active Expired - Lifetime
- 1994-08-04 US US08/286,037 patent/US5894935A/en not_active Expired - Fee Related
- 1994-08-05 JP JP6184674A patent/JP2752585B2/en not_active Expired - Fee Related
- 1994-08-05 CN CN94116159A patent/CN1056787C/en not_active Expired - Fee Related
- 1994-08-05 KR KR1019940019375A patent/KR0148400B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATE180420T1 (en) | 1999-06-15 |
| JP2752585B2 (en) | 1998-05-18 |
| JPH07155638A (en) | 1995-06-20 |
| DE59408302D1 (en) | 1999-07-01 |
| US5894935A (en) | 1999-04-20 |
| CN1122262A (en) | 1996-05-15 |
| KR0148400B1 (en) | 1998-11-16 |
| EP0638365B2 (en) | 2003-11-26 |
| EP0638365A3 (en) | 1995-09-13 |
| DE4326605A1 (en) | 1995-02-09 |
| ES2134296T3 (en) | 1999-10-01 |
| CN1056787C (en) | 2000-09-27 |
| TW259722B (en) | 1995-10-11 |
| KR950005382A (en) | 1995-03-20 |
| EP0638365A2 (en) | 1995-02-15 |
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