EP3570981B1 - Centrifuge - Google Patents
Centrifuge Download PDFInfo
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- EP3570981B1 EP3570981B1 EP18701030.1A EP18701030A EP3570981B1 EP 3570981 B1 EP3570981 B1 EP 3570981B1 EP 18701030 A EP18701030 A EP 18701030A EP 3570981 B1 EP3570981 B1 EP 3570981B1
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- flow
- centrifuge according
- several
- centrifuge
- drum
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/02—Continuous feeding or discharging; Control arrangements therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
- B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/06—Arrangement of distributors or collectors in centrifuges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
- B04B7/12—Inserts, e.g. armouring plates
Definitions
- the invention relates to a centrifuge according to the preamble of claim 1.
- centrifuges are known in a wide variety of configurations, in particular in a configuration as a separator with a vertical axis of rotation or as a solid bowl screw centrifuge with a vertical or horizontal axis of rotation.
- a generic centrifuge - see also the U.S. 3,438,571 A - for processing flowable or liquid products has a number of tubes and other flow volumes through which the product to be processed centrifugally or one of the phases resulting from the centrifugal separation and / or clarification flow during operation. These tubes and other volumes are referred to below as the total flow paths of the centrifuge.
- These flow paths include an inlet pipe, a distributor with distribution channels, an interior of the drum, if applicable - if available - a set of plates in the interior of the drum, one or more liquid drainage channels inside the drum, channels in the impeller (s), one or more Liquid outlets and, if necessary, a solids outlet.
- the flow paths each have different large cross-sections and / or different contouring (for example circular cross-section, oval or angular cross-section).
- a product to be processed with the centrifuge is fed through the feed pipe into the rotating drum, in which it is accelerated to the rotational speed of the rotating drum by a distributor and fed into the interior of the drum. This is where the actual centrifugal clarification and / or separation takes place.
- the phases separated from one another are then discharged through the corresponding liquid and / or solids outlets.
- the invention has the object of further developing the generic centrifuge in the sense of a further reduction in the formation of turbulent flow.
- a centrifuge is created with a drum rotatable about an axis of rotation with a flow path for a flowable or liquid product, which has at least one feed pipe, a distributor with at least one or more distributor channels for feeding product into the interior of the drum and at least one liquid discharge characterized in that at least one flow straightener or several flow straighteners is / are integrated into the flow path.
- the flow straightener is a device for reducing turbulent flows.
- a reduction of the effect of turbulent flows is achieved in a simple manner, at least locally in the area of the flow straightener and in its connection. This has a beneficial effect on the operation of the centrifuge.
- Several of the flow straighteners can also be provided. In this way, the vibrations of the centrifuge are reduced and the consequences of a reduced product throughput or incomplete clarification and / or separation are reduced or prevented.
- the at least one flow straightener has one or more stages.
- a multi-level structure makes it possible in particular to combine several structurally differently designed sections in just one flow straightener, which results in a particularly advantageous influencing of the flow conditions.
- one or more stages of the flow straightener are formed in a component of the separator that does not rotate during operation. This is because the flow straightener has a particularly advantageous effect on operation on this or these non-rotating components the centrifuge, which in particular results in a more uniform or low-vibration rotation behavior and / or results in an improved separation behavior of the suspension.
- At least one stage of the flow straightener is also designed as a flow laminator.
- the flow laminator divides the pipe section into which it is inserted or in which it is formed into two or more individual channels. In this way, a largely laminar flow is achieved in the area of these individual channels and also in the subsequent pipe section, in which there is hardly any turbulence.
- One or more stages can advantageously be provided in one or more of the following component (s) of the centrifuge that do not rotate during operation: in the inlet pipe and / or in a liquid outlet or in several liquid outlets for discharging a liquid phase from the drum, in particular in one or more of the one or more peeling discs optionally provided as a liquid drain and / or on a drain pipe.
- a particularly significant reduction in vibrations was achieved using a flow straightener in the feed pipe.
- one or more further stages of the single or multi-stage flow straightener to be provided on one or more of the following components of the centrifuge that rotate during operation: in one or more distribution channels of the distributor, and / or at least one Drainage channel for a light or heavy liquid phase, in particular on the distributor or above a separating plate, and / or in one or more plate gaps between plates of a possibly existing plate pack.
- At least one stage of the flow straightener can also advantageously be designed as a flow homogenizer.
- the flow homogenizer is designed in such a way that an essentially constant flow velocity of the liquid flowing through it results over its cross section. Unlike in a free pipe, the flow velocity is the one flowing through it The inside of the liquid is not or not significantly higher than at the edge of the pipe. This reduces the occurrence of pressure differences.
- one or more stages of the flow straightener reduce the occurrence of turbulent flows.
- the flow homogenizer and / or the flow laminator have a positive influence on the coalescence behavior of the suspension flowing through it.
- the flow straightener connected in series in the flow direction, has at least the two stages flow homogenizer and flow laminator - preferably in this sequence in the flow direction.
- At least one stage - in particular a last stage - of the flow straightener is designed as a diaphragm.
- the diaphragm has a cross-sectional reduction in which the cross section is smaller or smaller than the cross section of the pipe in front of and behind the diaphragm. In this way, a defined separation of the liquid flow is achieved at the transition from a pipe flow to a free jet flow, so that the laminarity of the liquid flow from one or more preceding stages is maintained.
- Fig. 1 shows a rotatable drum 1 of a centrifuge, which is designed as a separator with a vertical axis of rotation.
- the drum 1 is part of a system of the separator which rotates or rotates about the vertical axis of rotation during operation.
- the separator also has non-rotating components during operation, which in this respect do not belong to the rotating system.
- the separator can in this respect in addition to the drum 1 also other components - not all of them shown here such as a control computer, a drive motor for rotating the drum, a hood 30, a solids catcher 40 and so on.
- the rotatable drum 1 placed on a rotatably mounted drive spindle 2 is preferably - but not necessarily - designed for continuous operation, i.e. the continuous and non-batch processing of a product.
- the drum 1 consists of a lower part 3 and an upper part 4.
- a piston slide 5 is inserted into the lower part 3.
- a disk pack 7 of conical separating disks 8 is arranged in the interior 6 of the drum.
- the separation plates 8 are arranged on a distributor shaft 9 of a distributor 10.
- the components mentioned above in this paragraph belong to the rotating system of the separator. In this context, it should also be mentioned that the invention can also optimize, in particular, the operation of such a separator or decanter in the drum of which such a disk pack 7 made up of separating disks 8 is formed.
- a feed pipe 11 serves to feed a flowable product to be processed into the drum 1 (flow direction here: from top to bottom).
- the inlet pipe 11 is designed here as a stationary element that does not rotate during operation. It extends concentrically to the axis of rotation into the drum 1 Fig. 1 and 2 In a preferred - but not mandatory - configuration, it protrudes into the separator drum 1 from above. However, it can also extend into the drum 1 from below.
- the product emerging from the free end of the feed pipe 11 flows into radially extending distributor channels 12a, b of the distributor 10 and is rotated in these as a result of the rotations of the rotating separator drum 1 or accelerated in the circumferential direction.
- the distribution channels 12a, b (flow direction radially outwards) open into the drum interior 6 with the plate stack 7.
- the product is clarified from solids and - not shown here - optionally separated into two or more liquid phases of different density.
- the solid flows out of the disk package 7 radially outwards and the liquid phase radially inwards, where it is directed radially upwards on the disk package 7 in a drainage channel 13.
- the lighter liquid phase is also discharged through such a drainage channel 13 on the inside of the plate assembly 7, while the heavier liquid phase flows radially outward from the plate assembly 7 and is passed there through another drainage channel.
- This is formed, for example, between a separating plate above the plate assembly 7 and the upper drum part 4 (not shown here).
- one or more outlets are used for a liquid phase L.
- a single liquid outlet is provided.
- the liquid flowing radially inward from the plate stack 7 flows into a peeling disk chamber 14, which rotates with the drum 1 and is designed here as the upper, final part of this drum 1.
- a peeling disk 15 that does not rotate here arranged, which forms the liquid outlet.
- the peeling disk 15 has a disk section 16 arranged in the peeling disk chamber 12 as well as a peeling disk shaft 17 which is attached to an inner radius of the disk section 16 and protrudes outward from the peeling disk chamber 14 and the entire drum 1 into a line 18 outside the drum 1 flows out.
- the at least one inlet of the peeling disk 15 is preferably on the outer radius of the disk section 16. From this at least one inlet, the liquid flows in the disk section 16 radially inward (in at least one radial channel) and then flows axially upward through the peeling disk shaft 17 Drum and from the rotating system 1.
- the peeling disk 15 works on the principle of a centripetal pump. If another liquid phase is to be diverted, it is diverted via a further liquid drain, if necessary via a further paring disc.
- the solids are expelled from the centrifuge drum 1 to the outside through circumferentially distributed, radially extending outlet openings 19, preferably in the region of the largest radius / circumference of the centrifuge drum.
- the outlet openings 19 can be designed as nozzles through which solids are continuously ejected (not shown). Alternatively, an opening and closing mechanism can also be assigned to them.
- the hydraulically actuated piston valve 5 is provided in the lower drum part 2, with which the outlet openings 19 can be opened and closed again discontinuously.
- At least one or more flow straighteners 20 are installed in the flow path of the centrifuge - see FIG Figs. 2 to 4 - to integrate.
- the flow straightener 20 is a device for reducing turbulent flows.
- the flow straightener 20 can have one or more stages 20a, 20b, 20c.
- the at least one flow straightener 20 is preferably integrated into a section of the flow paths that is tubular. It is preferably used in this tubular section.
- the preferred structure of a flow straightener 20 inserted into the inlet pipe 11 is exemplified with reference to FIG Fig. 2 discussed.
- the flow straightener 20 - see Fig. 2 - Subdivides the cross-section of this tubular section over its entire length or part of its length into several individual cross-sections and / or chambers which are smaller compared to the overall cross-section. This is used to generate less turbulent flows.
- At least one step 20a of the flow straightener 20 is designed as a flow homogenizer 21.
- the flow homogenizer 21 is designed in such a way that an essentially constant flow velocity results over its cross section. In contrast to a free pipe, the flow velocity of the liquid flowing through is not or not significantly higher on the inside than at the edge of the pipe.
- the flow homogenizer 21 has walls which subdivide the pipe section in the area of the flow homogenizer 21 into a plurality of chambers 21a, b, c,... Which are fluidically connected to one another.
- the chambers 21a, b, c, ... preferably have a sponge, sieve and / or braid-like structure.
- the chambers 21a, b, c ensure a standardization of the flow velocity of the liquid flowing through over the entire cross section. In this way, in the area of these chambers 21a, b, c, ... and also in the pipe section following thereafter, a largely uniform flow and a largely uniform pressure over the cross section in this section is achieved.
- the flow homogenizer 21 here has a constant diameter D1 transverse to the main direction of extent X and a length L1.
- the flow homogenizer 21 preferably forms the first stage of several stages 20a, b, c of the flow straightener 20. Another advantage consists in an advantageous influencing of the separation process by the formation of droplets in a liquid phase of a dispersion.
- At least one step 20b of the flow straightener 20 can advantageously be designed as a flow laminator 22.
- the flow laminator 22 divides the pipe section into which it is inserted or in which it is formed into two or more individual channels 22a, b, c, ....
- the individual channels 22a, b, c, ... are whole or essentially separated from one another in terms of flow. However, they can also be connected to one another (across) in order to counteract different pressures. They preferably have relatively smooth inner walls.
- the flow velocity in them is preferably 0.1 m / sec to 20 m / sec.
- the individual channels 22a, b, c, d extend in sections or over their entire length parallel to one another. In this way, a largely laminar flow is achieved in the area of these individual channels 22a, b, c, ... and also in the subsequent pipe section, in which there is hardly any turbulence.
- the individual channels 22a, 22b, 22c, ... can be designed as parallel channels in a one-piece material block 22 * (see Fig. 5 ).
- This material block 22 * can consist of a ceramic, a metal and / or a plastic material.
- the individual channels 22a, b, c, ... can also be designed as individual tubes which are combined to form a tube bundle (not shown).
- the individual channels 22a, b, c, ... can have a round or angular cross section.
- the flow laminator 22 preferably forms the second stage of several stages 21, 22, 23 of the flow straightener 20.
- the flow laminator 22 has a diameter D2 transverse to the main direction of extent X and a length L2.
- I1 The distance between the flow homogenizer 21 and the flow laminator 22 is denoted by I1 (see FIG Fig. 2 ).
- At least one step 20c of the flow straightener 20 is then designed as a diaphragm 23.
- the diaphragm 23 has a cross-sectional reduction 23a, in which the cross section is smaller or reduced in comparison to the cross section of the pipe in front of and behind the diaphragm 23.
- the contour of the cross-sectional reduction 23a can be sharp-edged, rounded or conical (as shown) both on the inlet side and on the outlet side.
- the task of the diaphragm is a defined separation of the liquid flow at the transition from a pipe flow to a free jet flow, so that the laminarity of the liquid flow is maintained.
- the diaphragm 23 has an outer diameter D3 transverse to the main direction of extent X and an inner diameter d3 and a length L3.
- I2 The distance between the flow laminator 22 and the diaphragm 23 is denoted by I2.
- a particularly advantageous reduction in turbulence can be achieved in that one, two or all three of the stages 20a, 20b, 20c described above are arranged one behind the other in a flow passage or a flow path, in particular in a pipe section, preferably but not necessarily - in the order described.
- the at least one flow straightener 20 is entirely or at least some of the stages of the at least one flow straightener 20 are formed on a part that does not rotate when the centrifuge is in operation.
- one or more further stages of the at least one flow straightener or further flow straighteners can also optionally be formed on a part that rotates during operation of the centrifuge.
- the non-rotating parts can include the inlet pipe 11, one or more peeling disks 15 and / or a discharge pipe behind the peeling disk 15 in the direction of flow.
- one (see Fig. 3 ) or several distribution channels 12a, 12b, the plate gap (s) between two adjacent separating plates 8 of the plate assembly 7 see FIG Fig.
- the respective flow straightener 20 brings about a reduction in the turbulent flows both on the components that do not rotate during operation and on the rotating components. There is an imbalance in the process to be avoided by a suitable distribution of several flow straighteners, for example by inserting a flow straightener in each distribution channel.
- a particularly advantageous reduction in turbulence can be achieved in that one, two or all three of the stages described above are arranged one behind the other in a pipe section.
- the elements of the flow straightener can be manufactured in a wide variety of ways, including 3-D printing or other manufacturing processes such as welding, soldering, punching, drilling, milling, injection molding, gluing, joining and / or pressing.
- the invention is suitable not only for separators with a vertical axis of rotation but also for other centrifuges, for example also for solid bowl screw centrifuges with or without a disk pack.
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- Centrifugal Separators (AREA)
Description
Die Erfindung betrifft eine Zentrifuge nach dem Oberbegriff des Anspruchs 1.The invention relates to a centrifuge according to the preamble of claim 1.
Derartige Zentrifugen sind in verschiedensten Ausgestaltungen bekannt, insbesondere in einer Ausgestaltung als Separator mit vertikaler Drehachse oder als Vollmantel-Schneckenzentrifuge mit vertikaler oder horizontaler Drehachse. Rein beispielhaft seien zum Stand der Technik die
Eine gattungsgemäße Zentrifuge - siehe dazu die
A generic centrifuge - see also the
Ein mit der Zentrifuge zu verarbeitendes Produkt wird durch das Zulaufrohr in die sich drehende Trommel geleitet, in der es mit einem Verteiler auf Drehgeschwindigkeit der rotierenden Trommel beschleunigt und in den Trommelinnenraum geleitet wird. Dort findet die eigentliche zentrifugale Klärung und/oder Trennung statt. Sodann erfolgt ein Austrag der voneinander getrennten Phasen durch die entsprechenden Flüssigkeits- und/oder Feststoffauslässe.A product to be processed with the centrifuge is fed through the feed pipe into the rotating drum, in which it is accelerated to the rotational speed of the rotating drum by a distributor and fed into the interior of the drum. This is where the actual centrifugal clarification and / or separation takes place. The phases separated from one another are then discharged through the corresponding liquid and / or solids outlets.
Sowohl im Zulauf als auch bei dieser zentrifugalen Verarbeitung können sich lokal turbulente Strömungen bilden, welche den Betrieb der Zentrifuge negativ beeinflussen können, was z.B. zu Vibrationen der Zentrifuge, reduziertem Produktdurchsatz oder unvollständiger Klärung und/oder Trennung führen kann.Both in the inlet and during this centrifugal processing, locally turbulent flows can form, which can negatively affect the operation of the centrifuge, which can lead, for example, to vibrations of the centrifuge, reduced product throughput or incomplete clarification and / or separation.
Die Erfindung hat vor diesem Hintergrund die Aufgabe, die gattungsgemäße Zentrifuge im Sinne einer weitergehenden Reduzierung der Bildung turbulenter Strömung weiter zu entwickeln.Against this background, the invention has the object of further developing the generic centrifuge in the sense of a further reduction in the formation of turbulent flow.
Die Erfindung löst diese Aufgabe durch den Gegenstand des Anspruchs 1.The invention solves this problem with the subject matter of claim 1.
Geschaffen wird danach eine Zentrifuge mit einer um eine Drehachse drehbaren Trommel mit einem Durchflussweg für ein fließfähiges bzw. flüssiges Produkt, der wenigstens ein Zulaufrohr, einen Verteiler mit wenigstens einem oder mehreren Verteilerkanälen zur Zuleitung von Produkt in den Trommelinnenraum und wenigstens einen Flüssigkeitsaustrag aufweist, dadurch gekennzeichnet, dass in den Durchflussweg wenigstens ein Strömungsgleichrichter oder mehrere Strömungsgleichrichter integriert ist/sind.According to this, a centrifuge is created with a drum rotatable about an axis of rotation with a flow path for a flowable or liquid product, which has at least one feed pipe, a distributor with at least one or more distributor channels for feeding product into the interior of the drum and at least one liquid discharge characterized in that at least one flow straightener or several flow straighteners is / are integrated into the flow path.
Der Strömungsgleichrichter ist eine Einrichtung zur Minderung turbulenter Strömungen. Durch den Strömungsgleichrichter wird auf einfache Weise jedenfalls lokal im Bereich des Strömungsgleichrichters und in dessen Anschluss eine Reduzierung des Effektes turbulenter Strömungen erreicht. Dies wirkt sich vorteilhaft auf den Betrieb der Zentrifuge aus. Es können auch mehrere der Strömungsgleichrichter vorgesehen sein. Derart werden die Vibrationen der Zentrifuge verringert und die Folgen eines reduzierten Produktdurchsatzes oder einer unvollständigen Klärung und/oder Trennung gemindert oder verhindert.The flow straightener is a device for reducing turbulent flows. By means of the flow straightener, a reduction of the effect of turbulent flows is achieved in a simple manner, at least locally in the area of the flow straightener and in its connection. This has a beneficial effect on the operation of the centrifuge. Several of the flow straighteners can also be provided. In this way, the vibrations of the centrifuge are reduced and the consequences of a reduced product throughput or incomplete clarification and / or separation are reduced or prevented.
Dabei weist der wenigstens eine Strömungsgleichrichter eine oder mehrere Stufen auf. Durch einen mehrstufigen Aufbau ist es insbesondere möglich, mehrere konstruktiv verschieden ausgelegte Abschnitte in nur einem Strömungsgleichrichter zu kombinieren, was in einer besonders vorteilhaften Beeinflussung der Strömungsverhältnisse resultiert.The at least one flow straightener has one or more stages. A multi-level structure makes it possible in particular to combine several structurally differently designed sections in just one flow straightener, which results in a particularly advantageous influencing of the flow conditions.
Es hat sich weiter als besonders vorteilhaft herausgestellt, dass eine oder mehrere Stufen des Strömungsgleichrichters in einem sich im Betrieb nicht drehenden Bauteil des Separators ausgebildet sind. Denn an diesem oder diesen sich nicht drehenden Bauteilen wirkt sich der Strömungsgleichrichter besonders vorteilhaft auf den Betrieb der Zentrifuge aus, was insbesondere in einem gleichmäßigeren bzw. schwingungsärmeren Rotationsverhalten resultiert und/oder ein verbessertes Trennverhalten der Suspension zur Folge hat.It has also been found to be particularly advantageous that one or more stages of the flow straightener are formed in a component of the separator that does not rotate during operation. This is because the flow straightener has a particularly advantageous effect on operation on this or these non-rotating components the centrifuge, which in particular results in a more uniform or low-vibration rotation behavior and / or results in an improved separation behavior of the suspension.
Nach Anspruch 1 ist ferner wenigstens eine Stufe des Strömungsgleichrichters als Strömungslaminator ausgebildet. Der Strömungslaminator unterteilt den Rohrabschnitt, in den er eingesetzt oder in dem er ausgebildet ist, in zwei oder mehr Einzelkanäle. Derart wird im Bereich dieser Einzelkanäle und auch in dem darauffolgenden Rohrabschnitt eine weitgehend laminare Strömung erreicht, in dem kaum Turbulenzen vorhanden sind.According to claim 1, at least one stage of the flow straightener is also designed as a flow laminator. The flow laminator divides the pipe section into which it is inserted or in which it is formed into two or more individual channels. In this way, a largely laminar flow is achieved in the area of these individual channels and also in the subsequent pipe section, in which there is hardly any turbulence.
Es kann oder können vorteilhaft eine oder mehrere Stufen in einem oder mehreren der folgenden sich im Betrieb nicht drehenden Bauteil(en) der Zentrifuge vorgesehen sein: im Zulaufrohr und/oder in einem Flüssigkeitsablauf oder in mehreren Flüssigkeitsabläufen zur Ableitung einer Flüssigkeitsphase aus der Trommel, insbesondere in einer oder mehreren der ggf. als Flüssigkeitsablauf vorgesehenen einen oder mehreren Schälscheiben und/oder an einem Ablaufrohr. Eine besonders signifikante Verringerung von Schwingungen konnte durch einen Strömungsgleichrichter im Zulaufrohr erreicht werden.One or more stages can advantageously be provided in one or more of the following component (s) of the centrifuge that do not rotate during operation: in the inlet pipe and / or in a liquid outlet or in several liquid outlets for discharging a liquid phase from the drum, in particular in one or more of the one or more peeling discs optionally provided as a liquid drain and / or on a drain pipe. A particularly significant reduction in vibrations was achieved using a flow straightener in the feed pipe.
Optional ist es auch denkbar, wenn eine oder mehrere weitere Stufen des ein- oder mehrstufigen Strömungsgleichrichters an einem oder mehreren der folgenden sich im Betrieb drehenden Bauteil(e) der Zentrifuge vorgesehen ist: in einem oder mehreren Verteilerkanälen des Verteilers, und/oder wenigstens einem Ablaufkanal für eine leichte oder schwere Flüssigkeitsphase, insbesondere am Verteiler oder oberhalb eines Scheidetellers, und/oder in einem oder mehreren Tellerspalten zwischen Tellern eines ggf. vorhandenen Tellerpaketes.Optionally, it is also conceivable for one or more further stages of the single or multi-stage flow straightener to be provided on one or more of the following components of the centrifuge that rotate during operation: in one or more distribution channels of the distributor, and / or at least one Drainage channel for a light or heavy liquid phase, in particular on the distributor or above a separating plate, and / or in one or more plate gaps between plates of a possibly existing plate pack.
Konstruktiv kann weiter vorteilhaft wenigstens eine Stufe des Strömungsgleichrichters als Strömungshomogenisator ausgebildet sein. Der Strömungshomogenisator ist derart ausgestaltet, dass sich über seinen Querschnitt eine im Wesentlichen konstante Strömungsgeschwindigkeit der ihn durchströmenden Flüssigkeit ergibt. Anders als in einem freien Rohr ist die Strömungsgeschwindigkeit der durchströmenden Flüssigkeit innen nicht oder nicht wesentlich höher als am Rand des Rohres. Dies mindert das Auftreten von Druckunterschieden.In terms of construction, at least one stage of the flow straightener can also advantageously be designed as a flow homogenizer. The flow homogenizer is designed in such a way that an essentially constant flow velocity of the liquid flowing through it results over its cross section. Unlike in a free pipe, the flow velocity is the one flowing through it The inside of the liquid is not or not significantly higher than at the edge of the pipe. This reduces the occurrence of pressure differences.
Dabei ist eine zusätzliche vorteilhafte Wirkung einer oder mehrerer Stufen "Strömungshomogenisator" und/oder einer oder mehrerer Stufen "Strömungslaminator" besonders hervorzuheben: Sowohl der Strömungshomogenisator als auch der Strömungslaminator im Zulauf wirken mit ihren Oberflächen wie eine Ansammlung von Füllkörpern, wodurch das Koaleszenzverhalten der hierdurch fließenden Suspension positiv beeinflusst wird. Das bedeutet, dass an den Oberflächen das Agglomerieren von Teilchen begünstigt wird, was zu größeren Teilchen der jeweiligen Phasen der Suspension führt. Diese größeren Teilchen in den jeweiligen Phasen begünstigen den anschließenden zentrifugalen Trennprozess.An additional advantageous effect of one or more stages "flow homogenizer" and / or one or more stages "flow laminator" is particularly noteworthy: Both the flow homogenizer and the flow laminator in the inlet act with their surfaces like an accumulation of fillers, which results in the coalescence behavior of the flowing suspension is positively influenced. This means that the agglomeration of particles is favored on the surfaces, which leads to larger particles of the respective phases of the suspension. These larger particles in the respective phases favor the subsequent centrifugal separation process.
Diese beschriebene zusätzliche vorteilhafte Wirkung beschränkt sich nicht darauf, dass eine oder mehrere Stufen "Strömungshomogenisator" und/oder eine oder mehrere Stufen "Strömungslaminator" in dem stehenden Zulaufrohr oder einem Ablauf innerhalb der Zentrifugentrommel integriert sind, sondern kann auch erzielt werden, wenn diese Komponente/n in einem Zulaufrohr der Zentrifuge (also upstream) installiert wird/werden, das nicht bis in die Trommel hineinragt. In diesem Sinne sind auch eine Zulaufleitung oder Ablaufleitung zur Zentrifuge oder von der Zentrifuge weg ganz außerhalb der Trommel als Teil der Zentrifuge im Sinne der Ansprüche zu betrachten.This additional advantageous effect described is not limited to the fact that one or more stages “flow homogenizer” and / or one or more stages “flow laminator” are integrated in the vertical feed pipe or an outlet within the centrifuge drum, but can also be achieved if this component / n is / are installed in an inlet pipe of the centrifuge (i.e. upstream) that does not protrude into the drum. In this sense, an inlet line or outlet line to the centrifuge or away from the centrifuge completely outside of the drum are also to be regarded as part of the centrifuge in the sense of the claims.
Vorzugsweise bewirken eine oder mehrere Stufen des Strömungsgleichrichters eine Minderung des Auftretens turbulenter Strömungen.Preferably, one or more stages of the flow straightener reduce the occurrence of turbulent flows.
Zudem beeinflussen der Strömungshomogenisator und/oder der Strömungslaminator positiv das Koaleszenzverhalten der hierdurch fließenden Suspension.In addition, the flow homogenizer and / or the flow laminator have a positive influence on the coalescence behavior of the suspension flowing through it.
Um eine besonders vorteilhafte Variante auszubilden, kann vorgesehen sein, dass der Strömungsgleichrichter in Strömungsrichtung in Reihe geschaltet zumindest die zwei Stufen Strömungshomogenisator und Strömungslaminator - vorzugsweise in Strömungsrichtung in dieser Reihenfolge - aufweist.In order to form a particularly advantageous variant, it can be provided that the flow straightener, connected in series in the flow direction, has at least the two stages flow homogenizer and flow laminator - preferably in this sequence in the flow direction.
Sodann kann optional vorteilhaft vorgesehen sein, dass wenigstens eine Stufe - insbesondere eine letzte Stufe - des Strömungsgleichrichters als Blende ausgebildet ist. Die Blende weist eine Querschnittsreduzierung auf, in welcher der Querschnitt im Vergleich zum Querschnitt des Rohres vor und hinter der Blende geringer bzw. verkleinert ist. Erreicht wird derart eine definierte Ablösung der Flüssigkeitsströmung bei dem Übergang von einer Rohrströmung in eine Freistrahlströmung, so dass die Laminarität der Flüssigkeitsströmung aus einer oder mehr vorhergehenden Stufen erhalten bleibt.Then, optionally, it can advantageously be provided that at least one stage - in particular a last stage - of the flow straightener is designed as a diaphragm. The diaphragm has a cross-sectional reduction in which the cross section is smaller or smaller than the cross section of the pipe in front of and behind the diaphragm. In this way, a defined separation of the liquid flow is achieved at the transition from a pipe flow to a free jet flow, so that the laminarity of the liquid flow from one or more preceding stages is maintained.
Vorteilhafte Ausgestaltungen sind den Unteransprüchen zu entnehmen.Advantageous refinements can be found in the subclaims.
Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen unter Bezug auf die Figuren näher beschrieben. Es zeigen:
- Fig. 1
- einen Schnitt durch die Trommel und Haube von einem Separator;
- Fig. 2
- einen Abschnitt eines Separators ähnlich zu
Fig. 1 mit einem in einem Zulaufrohr angeordneten Strömungsgleichrichter; - Fig. 3
- einen Abschnitt des Separators aus
Fig. 1 mit einem in einem Verteilerkanal angeordneten Strömungsgleichrichter; - Fig. 4
- eine schematische Ansicht eines Tellerspaltes zwischen zwei Trenntellern des Separators aus
Fig.1 mit zwei unterschiedlichen in diesem Tellerspalt angeordneten Strömungsgleichrichtern; und - Fig. 5
- eine schematische Ansicht eines Strömungslaminators.
- Fig. 1
- a section through the drum and hood of a separator;
- Fig. 2
- a section of a separator similar to
Fig. 1 with a flow straightener arranged in a feed pipe; - Fig. 3
- a section of the separator
Fig. 1 with a flow straightener arranged in a distribution channel; - Fig. 4
- a schematic view of a plate gap between two separation plates of the separator
Fig. 1 with two different flow straighteners arranged in this disk gap; and - Fig. 5
- a schematic view of a flow laminator.
Die Trommel 1 ist ein Teil eines sich im Betrieb um die vertikale Drehachse drehenden bzw. rotierenden Systems des Separators.The drum 1 is part of a system of the separator which rotates or rotates about the vertical axis of rotation during operation.
Daneben weist der Separator auch sich im Betrieb nicht drehende Komponenten auf, die insofern nicht dem rotierenden System zugehören. Der Separator kann insofern neben der Trommel 1 noch weitere - hier nicht sämtlich dargestellte - Komponenten wie einen Steuerungsrechner, einen Antriebsmotor zum Drehen der Trommel, eine Haube 30, einen Feststofffänger 40 usw. aufweisen.In addition, the separator also has non-rotating components during operation, which in this respect do not belong to the rotating system. The separator can in this respect in addition to the drum 1 also other components - not all of them shown here such as a control computer, a drive motor for rotating the drum, a
Die auf eine drehbar gelagerte Antriebsspindel 2 aufgesetzte drehbare Trommel 1 ist vorzugsweise - aber nicht zwingend - für einen kontinuierlichen Betrieb - d.h. die kontinuierliche und nicht chargenweise Verarbeitung eines Produktes - ausgelegt. Die Trommel 1 besteht aus einem Unterteil 3 und einem Oberteil 4. In das Unterteil 3 ist ein Kolbenschieber 5 eingesetzt. In der konischen bzw. hier sogar doppelt-konisch geformten Trommel 1 ist im Trommelinnenraum 6 ein Tellerpaket 7 aus konischen Trenntellern 8 angeordnet. Die Trennteller 8 sind auf einem Verteilerschaft 9 eines Verteilers 10 angeordnet. Die in diesem Absatz vorstehend erwähnten Komponenten gehören zum sich drehenden System des Separators. In diesem Zusammenhang ist auch zu erwähnen, dass sich mit der Erfindung insbesondere auch der Betrieb eines solchen Separators oder Dekanters optimieren lässt, in dessen Trommel ein solches Tellerpaket 7 aus Trenntellern 8 ausgebildet ist.The rotatable drum 1 placed on a rotatably mounted drive spindle 2 is preferably - but not necessarily - designed for continuous operation, i.e. the continuous and non-batch processing of a product. The drum 1 consists of a
Ein Zulaufrohr 11 dient zur Zuleitung eines zu verarbeitenden fließfähigen Produktes in die Trommel 1 (Strömungsrichtung hier: von oben nach unten). Das Zulaufrohr 11 ist hier als sich im Betrieb nicht drehendes, stillstehendes Element ausgebildet. Es erstreckt sich konzentrisch zur Drehachse in die Trommel 1. Nach
Das aus dem freien Ende des Zulaufrohrs 11 austretende Produkt strömt in sich radial erstreckende Verteilerkanäle 12a, b des Verteilers 10 und wird in diesen infolge der Drehungen der sich drehenden Separatortrommel 1 mitgedreht bzw. in Umfangsrichtung beschleunigt.The product emerging from the free end of the
Die Verteilerkanäle 12a, b (Strömungsrichtung radial nach außen) münden in den Trommelinnenraum 6 mit dem Tellerstapel 7. In dem Trommelinnenraum 6 - auch Schleuderraum genannt - erfolgt eine Klärung des Produktes von Feststoffen sowie - hier nicht dargestellt - ggf. optional eine Trennung in zwei oder mehr Flüssigkeitsphasen unterschiedlicher Dichte.The
Bei einer Klärung fließt der Feststoff aus dem Tellerpaket 7 radial nach außen und die Flüssigkeitsphase radial nach innen, wo sie radial innen am Tellerpaket 7 in einem Ablaufkanal 13 radial nach oben geleitet wird.In the case of clarification, the solid flows out of the
Sofern auch oder alternativ eine Trennung in zwei Flüssigkeitsphasen verschiedener Dichte erfolgt, wird die leichtere Flüssigkeitsphase ebenfalls durch einen solchen Ablaufkanal 13 innen am Tellerpaket 7 abgeleitet, während die schwerere Flüssigkeitsphase radial nach außen aus dem Tellerpaket 7 fließt und dort durch einen weiteren Ablaufkanal geleitet wird. Dieser ist beispielsweise zwischen einem Scheideteller oberhalb des Tellerpakets 7 und dem Trommeloberteil 4 ausgebildet (hier nicht dargestellt).If there is also or alternatively a separation into two liquid phases of different densities, the lighter liquid phase is also discharged through such a
Zur Ableitung der wenigstens einen Flüssigkeitsphase L -
Nach
Die Schälscheibe 15 weist einen in der Schälscheibenkammer 12 angeordneten Scheibenabschnitt 16 auf sowie einen an einem inneren Radius des Scheibenabschnittes 16 ansetzenden und von dort aus der Schälscheibenkammer 14 und der gesamten Trommel 1 nach außen vorstehenden Schälscheibenschaft 17, der in eine Leitung 18 außerhalb der Trommel 1 mündet.The
Der wenigstens eine Einlass der Schälscheibe 15 liegt vorzugsweise am Außenradius des Scheibenabschnitts 16. Von diesem wenigstens einen Einlass aus fließt die Flüssigkeit in dem Scheibenabschnitt 16 radial nach innen (in wenigstens einem radialen Kanal) und strömt dann durch den Schälscheibenschaft 17 axial nach oben aus der Trommel und aus dem sich drehenden System 1. Die Schälscheibe 15 arbeitet nach dem Prinzip einer Zentripetalpumpe. Sofern eine weitere Flüssigkeitsphase abzuleiten ist, erfolgt deren Ableitung über einen weiteren Flüssigkeitsablauf, ggf. über eine weitere Schälscheibe.The at least one inlet of the
Die Feststoffe werden durch umfangsverteilte, sich radial erstreckende Austrittsöffnungen 19 vorzugsweise im Bereich des größten Radius/Umfangs der Zentrifugentrommel aus der Zentrifugentrommel 1 nach außen ausgestoßen.The solids are expelled from the centrifuge drum 1 to the outside through circumferentially distributed, radially extending
Die Austrittsöffnungen 19 können als Düsen ausgebildet sein, durch die kontinuierlich Feststoffe ausgestoßen werden (nicht dargestellt). Ihnen kann alternativ aber auch ein Öffnungs- und Schließmechanismus zugeordnet sein. Nach
Zur Optimierung des Strömungsverhaltens ist vorgesehen, in den Durchflussweg der Zentrifuge wenigstens einen oder mehrere Strömungsgleichrichter 20 - siehe
Der Strömungsgleichrichter 20 ist eine Einrichtung zur Minderung turbulenter Strömungen. Der Strömungsgleichrichter 20 kann eine oder mehrere Stufen 20a, 20b, 20c aufweisen.The
Der wenigstens eine Strömungsgleichrichter 20 wird vorzugsweise in einen Abschnitt der Durchflusswege integriert, der rohrartig ausgebildet ist. Er wird vorzugsweise in diesen rohrartigen Abschnitt eingesetzt. Nachfolgend wird beispielhaft anhand eines in das Zulaufrohr 11 eingesetzten Strömungsgleichrichters 20 dessen bevorzugter Aufbau unter Bezug auf
Der Strömungsgleichrichter 20 - siehe
Nach einer bevorzugten Ausgestaltung ist wenigstens eine Stufe 20a des Strömungsgleichrichters 20 als Strömungshomogenisator 21 ausgebildet. Der Strömungshomogenisator 21 ist derart ausgestaltet, dass sich über seinen Querschnitt eine im Wesentlichen konstante Strömungsgeschwindigkeit ergibt. Anders als in einem freien Rohr ist die Strömungsgeschwindigkeit der durchströmenden Flüssigkeit innen nicht oder nicht wesentlich höher als am Rand des Rohres.According to a preferred embodiment, at least one
Der Strömungshomogenisator 21 weist dazu Wandungen auf, welche den Rohrabschnitt im Bereich des Strömungshomogenisators 21 in eine Vielzahl miteinander strömungstechnisch verbundener Kammern 21a, b, c, ... unterteilen.For this purpose, the
Vorzugsweise weisen die Kammern 21a, b, c, ... eine schwamm-, sieb- und/oder geflechtartige Struktur auf. Die Kammern 21a, b, c sorgen über den Gesamtquerschnitt für eine Vereinheitlichung der Strömungsgeschwindigkeit der durchströmenden Flüssigkeit. Derart wird im Bereich dieser Kammern 21a, b, c, ... und auch in dem drauf folgenden Rohrabschnitt eine weitgehend gleichmäßige Strömung und ein weitgehend gleicher Druck über den Querschnitt in diesem Abschnitt erreicht.The
Der Strömungshomogenisator 21 weist hier einen konstanten Durchmesser D1 quer zur Haupterstreckungsrichtung X und eine Länge L1 auf. Für eine vorteilhafte Beeinflussung der Strömung zur Unterdrückung turbulenter Strömungen ist nach Versuchen vorteilhaft, wenn D1 und L1 folgende Bedingung erfüllen:
Der Strömungshomogenisator 21 bildet vorzugsweise die erste Stufe von mehreren Stufen 20a, b, c des Strömungsgleichrichters 20. Ein weiterer Vorteil besteht in einer vorteilhaften Beeinflussung des Trennvorganges durch Tröpchenbildung in einer Flüssigkeitsphase einer Dispersion.The
Wenigstens eine Stufe 20b des Strömungsgleichrichters 20 kann vorteilhaft als Strömungslaminator 22 ausgebildet sein. Der Strömungslaminator 22 unterteilt den Rohrabschnitt, in den er eingesetzt oder in dem er ausgebildet ist, in zwei oder mehr Einzelkanäle 22a, b, c, .... Die Einzelkanäle 22a, b, c, .... sind nach einer Variante ganz oder im Wesentlichen voneinander strömungstechnisch getrennt. Sie können aber auch miteinander (quer) verbunden sein, um unterschiedlichen Drücken entgegenzuwirken. Sie weisen vorzugsweise relativ glatte Innenwände auf. Die Strömungsgeschwindigkeit in ihnen beträgt vorzugsweise 0,1 m/sec bis 20 m/sec.At least one
Es erstrecken sich die Einzelkanäle 22a, b, c, d, abschnittsweise oder über ihre gesamte Länge parallel zueinander. Derart wird im Bereich dieser Einzelkanäle 22a, b, c, ... und auch in dem darauffolgenden Rohrabschnitt eine weitgehend laminare Strömung erreicht, in dem kaum Turbulenzen vorhanden sind.The
Die Einzelkanäle 22a, 22b, 22c, ... können als parallel verlaufende Kanäle in einem einstückigen Materialblock 22* ausgebildet sein (siehe
Der Strömungslaminator 22 bildet vorzugsweise die zweite Stufe von mehreren Stufen 21, 22, 23 des Strömungsgleichrichters 20 aus.The flow laminator 22 preferably forms the second stage of
Der Strömungslaminator 22 weist einen Durchmesser D2 quer zur Haupterstreckungsrichtung X und eine Länge L2 auf. Für eine vorteilhafte Beeinflussung der Strömung zur Unterdrückung turbulenter Strömungen ist nach Versuchen vorteilhaft, wenn D2 und L2 folgende Bedingung erfüllen:
Wird das Verhältnis L2/D2 zu klein, ist die Wirkung zu gering. Wird es zu groß, erhöht sich der Strömungswiderstand zu hoch.If the ratio L2 / D2 becomes too small, the effect is too small. If it becomes too big, the flow resistance increases too high.
Der Abstand zwischen dem Strömungshomogenisator 21 und dem Strömungslaminator 22 sei mit I1 bezeichnet (siehe
Wird das Verhältnis I1/L1 zu groß (>1), lässt der erreichte strömungstechnische Vorteil vor Erreichen der nächsten Stufe relativ stark nach.If the ratio I1 / L1 becomes too large (> 1), the flow advantage achieved decreases relatively sharply before reaching the next stage.
Nach einer bevorzugten Ausgestaltung ist sodann wenigstens eine Stufe 20c des Strömungsgleichrichters 20 als Blende 23 ausgebildet. Die Blende 23 weist eine Querschnittsreduzierung 23a auf, in welcher der Querschnitt im Vergleich zum Querschnitt des Rohres vor und hinter der Blende 23 geringer bzw. verkleinert ist. Die Kontur der Querschnittsreduzierung 23a kann sowohl auf der Zulauf- als auch auf der Ablaufseite scharfkantig, gerundet oder konisch (wie dargestellt) sein.According to a preferred embodiment, at least one step 20c of the
Aufgabe der Blende ist eine definierte Ablösung der Flüssigkeitsströmung bei dem Übergang von einer Rohrströmung in eine Freistrahlströmung, so dass die Laminarität der Flüssigkeitsströmung erhalten bleibt.The task of the diaphragm is a defined separation of the liquid flow at the transition from a pipe flow to a free jet flow, so that the laminarity of the liquid flow is maintained.
Die Blende 23 weist einen Außendurchmesser D3 quer zur Haupterstreckungsrichtung X und einen Innendurchmesser d3 sowie eine Länge L3 auf. Für eine vorteilhafte Beeinflussung der Strömung zur Unterdrückung turbulenter Strömungen ist es nach Versuchen vorteilhaft, wenn D3, d3 und L3 folgende Bedingung erfüllen:
Liegt entweder das Verhältnis L3/D3 oberhalb des angegeben Wertbereiches bzw. das Verhältnis d3/D3 unterhalb des angegeben Wertebereiches, wird der Strömungswiderstand der Blende 23 unvorteilhaft groß.If either the ratio L3 / D3 is above the specified range of values or the ratio d3 / D3 is below the specified range of values, the flow resistance of the
Liegt das Verhältnis d3/D3 oberhalb des angegeben Wertebereiches, ist die in diesen Zusammenhang angestrebte Wirkung der Blende 23 kaum noch oder nicht mehr hinreichend gegeben.If the ratio d3 / D3 is above the specified range of values, the effect of the
Liegt es unterhalb des angegeben Wertes, ist die Wirkung der Blende 23 kaum noch oder nicht mehr hinreichend gegeben.If it is below the specified value, the effect of the
Der Abstand zwischen dem Strömungslaminator 22 und der Blende 23 wird mit I2 bezeichnet. Für eine vorteilhafte Beeinflussung der Strömung zur Unterdrückung turbulenter Strömungen ist nach Versuchen weiter vorteilhaft, wenn I2 und L2 folgende Bedingung erfüllen:
Wird das Verhältnis I2/L2 zu groß (>1), lässt der erreichte strömungstechnische Vorteil vor Erreichen der nächsten Stufe relativ stark nach.If the ratio I2 / L2 is too large (> 1), the flow advantage achieved decreases relatively sharply before reaching the next stage.
Eine besonders vorteilhafte Verringerung von Turbulenzen kann dadurch erreicht werden, dass eine, zwei oder sämtliche drei der vorstehend beschriebenen Stufen 20a, 20b, 20c in einer Durchflusspassage bzw. einem Durchflussweg, insbesondere in einem Rohrabschnitt, hintereinander angeordnet sind und zwar vorzugsweise - aber nicht zwingend - in der beschriebenen Reihenfolge.A particularly advantageous reduction in turbulence can be achieved in that one, two or all three of the
Dabei ist der wenigstens eine Strömungsgleichrichter 20 ganz oder es sind zumindest einzelne der Stufen des wenigstens einen Strömungsgleichrichters 20 an einem sich im Betrieb der Zentrifuge nicht drehenden Teil ausgebildet. Es können aber auch optional eine oder mehrere weitere Stufen des wenigstens einen Strömungsgleichrichters oder weitere Strömungsgleichrichter insgesamt an einem sich im Betrieb der Zentrifuge drehenden Teil ausgebildet sein. Zu den nicht drehenden Teilen können das Zulaufrohr 11, eine oder mehrere Schälscheiben 15 und/oder ein Ablaufrohr in Strömungsrichtung hinter der Schälscheibe 15 gehören. Zu den sich drehenden Teilen können insbesondere einer (siehe
Eine besonders vorteilhafte Verringerung von Turbulenzen kann dadurch erreicht werden, dass eine, zwei oder sämtliche drei der vorstehend beschriebenen Stufen in einem Rohrabschnitt hintereinander angeordnet sind.A particularly advantageous reduction in turbulence can be achieved in that one, two or all three of the stages described above are arranged one behind the other in a pipe section.
Die Elemente des Strömungsgleichrichters können auf verschiedenste Weise hergestellt sein, so auch im 3-D-Druck oder durch ein sonstiges Herstellverfahren wie Schweißen, Löten, Stanzen, Bohren, Fräsen, Spritzguss, Kleben, Fügen und/oder Pressen.The elements of the flow straightener can be manufactured in a wide variety of ways, including 3-D printing or other manufacturing processes such as welding, soldering, punching, drilling, milling, injection molding, gluing, joining and / or pressing.
Die Erfindung eignet sich nicht nur für Separatoren mit vertikaler Drehachse sondern auch für andere Zentrifugen, beispielsweise auch für Vollmantel-Schneckenzentrifugen mit oder ohne Tellerpaket.
Claims (19)
- Centrifuge comprising a drum (1) which is rotatable about an axis of rotation (D) and has a flow path for a flowable product, the flow path having at least one feed pipe (11) which does not rotate during operation, and a distributor (9) in the drum (1) having at least one or several distributor channels (12a, 12b) for feeding product into the drum interior (6) and at least one liquid outlet, wherein at least one flow rectifier (20) is integrated in the flow path, wherein the at least one flow rectifier (20) has one or several stages (20a, 20b, 20c), wherein the one or at least one of the optionally several stages of the at least one flow rectifier is/are formed in at least one flow path of a component of the separator which does not rotate during operation, characterized in that at least one stage (20a) of the flow rectifier is formed as a flow laminator (22), and in that the flow laminator (22) divides a pipe section into which it is inserted or in which it is formed into two or several individual channels (22a, b, c, ...) which extend parallel to one another in sections or over their entire length.
- Centrifuge according to claim 1, characterized in that a plate stack (7) of separating plates (8) is arranged in the drum (1).
- Centrifuge according to one or more of claims 1 to 2, characterized in that the flow rectifier has at least one stage designed as a flow homogenizer (21) and the stage designed as a flow laminator (22) which are connected in series in the direction of flow.
- Centrifuge according to claim 3, characterized in that the flow homogenizer (21) is designed in such a way that a substantially constant flow velocity is obtained over its cross-section.
- Centrifuge according to one of the preceding claims 3 or 4, characterized in that the flow homogenizer (21) has walls which divide said flow homogenizer (21) into a plurality of chambers (21a, b, c, ...) connected to one another in terms of flow.
- Centrifuge according to one of the preceding claims 3 to 5, characterized in that the flow homogenizer (21) has a sponge-, screen- and/or braid-like structure.
- Centrifuge according to one of the preceding claims 3 to 7, characterized in that the flow homogenizer (21) forms the first stage of several stages (20a, b, c) of the flow rectifier (20).
- Centrifuge according to one of the preceding claims, characterized in that the individual channels (22a, 22b, 22c, ...) are formed as channels extending in parallel in a block of material (22*) or in that the individual channels (22a, b, c, ...) are formed as individual pipes which are combined to form a pipe bundle.
- Centrifuge according to one of the preceding claims, characterized in that the flow laminator (22) forms the second stage of several stages (21, 22, 23) of the flow rectifier (20).
- Centrifuge according to one of the preceding claims, characterized in that at least one optional stage (20c) of the flow rectifier (20) is designed as a baffle (23), which has a cross-sectional reduction (23a).
- Centrifuge according to one of the preceding claims, characterized in that one or several stages of the single- or multi-stage flow rectifier (20) is/are provided in one or several of the following components of the centrifuge which do not rotate during operation:a. in the feed pipe (11), and/orb. in a liquid drain or in several liquid drains for draining a liquid phase from the drum, in particular in one or several of the peeling discs (15) optionally provided as liquid drain and/or on a drain pipe.
- Centrifuge according to one of the preceding claims, characterized in that one or several further stages of the single- or multi-stage flow rectifier (20) is/are provided in one or several of the following components of the centrifuge which rotate during operation:a. in one or several distributor channels (12a, 12b) of the distributor, and/orb. at least one discharge channel (13) for a light or heavy liquid phase, in particular at the distributor or above one separating plate, and/orc. in one or several plate gaps between plates of an optionally existing plate stack (7).
- Centrifuge according to one of the preceding claims, characterized in that one or several stages of the flow rectifier reduce the occurrence of turbulent flows.
- Centrifuge according to one of the preceding claims, characterized in that the flow homogenizer and/or the flow laminator positively influence the coalescence behavior of the suspension flowing through it.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102017101129 | 2017-01-20 | ||
PCT/EP2018/051240 WO2018134320A1 (en) | 2017-01-20 | 2018-01-18 | Centrifuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3570981A1 EP3570981A1 (en) | 2019-11-27 |
EP3570981B1 true EP3570981B1 (en) | 2021-03-03 |
Family
ID=61017937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18701030.1A Active EP3570981B1 (en) | 2017-01-20 | 2018-01-18 | Centrifuge |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3570981B1 (en) |
DE (1) | DE102018101102A1 (en) |
WO (1) | WO2018134320A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2594445A (en) * | 1946-10-23 | 1952-04-29 | Sharples Corp | Centrifugal machine and process |
CH436132A (en) | 1962-05-19 | 1967-05-15 | Mueller Hans | centrifuge |
US3438571A (en) * | 1965-03-08 | 1969-04-15 | Alfa Laval Ab | Centrifugal separator |
DE1532721A1 (en) * | 1966-08-20 | 1970-03-12 | Buckau Wolf Maschf R | Solid bowl centrifuge with a central outlet opening in the centrifugal drum |
AT374120B (en) | 1980-09-15 | 1984-03-26 | Berber Viktor A | CONE PLATE FOR A SEPARATOR |
US6019717A (en) | 1998-08-19 | 2000-02-01 | Fleetguard, Inc. | Nozzle inlet enhancement for a high speed turbine-driven centrifuge |
-
2018
- 2018-01-18 EP EP18701030.1A patent/EP3570981B1/en active Active
- 2018-01-18 DE DE102018101102.4A patent/DE102018101102A1/en not_active Withdrawn
- 2018-01-18 WO PCT/EP2018/051240 patent/WO2018134320A1/en unknown
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP3570981A1 (en) | 2019-11-27 |
DE102018101102A1 (en) | 2018-07-26 |
WO2018134320A1 (en) | 2018-07-26 |
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