NL2033073B1 - Combined separator - Google Patents

Combined separator Download PDF

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Publication number
NL2033073B1
NL2033073B1 NL2033073A NL2033073A NL2033073B1 NL 2033073 B1 NL2033073 B1 NL 2033073B1 NL 2033073 A NL2033073 A NL 2033073A NL 2033073 A NL2033073 A NL 2033073A NL 2033073 B1 NL2033073 B1 NL 2033073B1
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NL
Netherlands
Prior art keywords
centrifugal separator
plates
carrier
plate
fluid
Prior art date
Application number
NL2033073A
Other languages
Dutch (nl)
Inventor
Arie Boele Hendrik
Tiemann Andreas
Original Assignee
Biorganics Uft B V
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Biorganics Uft B V filed Critical Biorganics Uft B V
Priority to NL2033073A priority Critical patent/NL2033073B1/en
Priority to PCT/NL2023/050485 priority patent/WO2024063644A1/en
Application granted granted Critical
Publication of NL2033073B1 publication Critical patent/NL2033073B1/en

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
    • B04B2005/125—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers the rotors comprising separating walls

Abstract

The present disclosure relates to a centrifugal separator for separating one or more suspended particulate components from a fluid, the centrifugal separator comprising a carrier rotatable around an axial axis thereof and arranged in a housing comprising a fluid inlet and a fluid outlet, wherein the housing comprises a brush pack having a plurality of bristles extending in a radially outward direction relative to the axial axis of the carrier, said brush defining a coarse separation section, and a plate pack comprising a plurality of plates extending in an axial direction of, and in a radial outward direction relative to, the axial axis of the carrier, said plate pack defining a fine separation section. The present disclosure moreover relates to a method for separating one or more particulate components suspended in a fluid, comprising usage of a centrifugal separator according to the disclosure.

Description

COMBINED SEPARATOR
The present disclosure relates to a centrifugal separator for separating one or more suspended particulate components from a fluid.
It is known to utilise centrifugal separators to separate components from a wide arrange of fluids, including water, liquids, gasses, oils and the like. Examples of particulate components that may be separated from a fluid by means of a centrifugal separator include both solid matter (e.g. fine sand) and biological matter, such as algae.
Centrifugal separators are known to comprise an interior into which a fluid is introduced and induced to rotate. The resultant centrifugal force induces particulate components suspended in the fluid to drift towards a side of the interior of the centrifugal separator, where they accumulate and are thus separated from the fluid. The remaining fluid — now substantially free of suspended particles — is subsequently allowed to flow out of the interior.
A disadvantage of the here above described centrifugal separators is that the separated particulate components accumulate in the interior of the centrifugal separator, which therefore needs to be emptied on a regular basis. Emptying the centrifugal separator is a comprehensive operation that typically includes shutting down the centrifugal separator and draining the fluid from its interior. Accumulated particulate components may then be removed from the interior of the centrifugal separator. This is typically done by removing at least a part of the enclosure of the centrifugal separator and then powering on the centrifugal separator, after which particulate components are ejected outward by the resultant centrifugal force.
A further disadvantage of known centrifugal separators is their relatively poor performance when a mixture of different particulate components (i.e. comprising particles of various mass densities and particle sizes) is to be separated from a fluid.
The objective of the present disclosure is to provide a centrifugal separator with which one of more of the hereabove described disadvantages. or other disadvantages, of known centrifugal separators are obviated or abated.
This objective is achieved with a centrifugal separator for separating one or more suspended particulate components from a fluid, the centrifugal separator comprising a carrier rotatable around an axial axis thereof and arranged in a housing comprising a fluid inlet and a fluid outlet, wherein the housing comprises a brush pack having a plurality of bristles extending in a radially outward direction relative to the axial axis of the carrier, said brush pack defining a coarse separation section, and a plate pack comprising a plurality of plates extending in an axial direction of, and in a radial outward direction relative to, the axial axis of the carrier, said plate pack defining a fine separation section.
The above centrifugal separator has been found to be particularly suitable for separating mixtures of suspended particulate components that vary with respect to their respective mass densities and particle sizes. Suspended particles having a relatively high mass density predontinantly precipitate in coarse separation section of the centrifugal separator, whereas suspended particles having a relatively low mass density predominantly precipitate in the fine separation section.
A further advantage of the above centrifugal separator is that the separated particular components precipitate substantially along the entire length of the (interior of the housing of the) centrifugal separator, with the likelihood of a concentrated local accumulation of separated particular components forming within the centrifugal separator being significantly reduced. In other words, the storage capacity of the centrifugal separator for precipitated particular components is optimized, resulting in the centrifugal separator according to the present disclosure needing to be emptied on a less frequent basis.
In a preferred embodiment of the centrifugal separator, the plurality of plates defining the fine separation section is arranged downstream of the brush pack defining the coarse separation section.
In a further preferred embodiment of the centrifugal separator, the centrifugal separator further comprises one or more than one further brush pack arranged downstream of the brush pack. wherein the brush pack and the one or more than one further brush pack define subsections of the coarse separation section.
In a further preferred embodiment of the centrifugal separator, the brush pack and the one or more than one further brush pack differ from one another with respect to at least one of a number of bristles, a density of the bristles and a thickness of the bristles.
In a further preferred embodiment of the centrifugal separator, the centrifugal separator further comprises one or more than further plate pack arranged downstream of the plate pack. wherein the plate pack and the one or more than one further plate pack detine subsections of the fine separation section.
In a further preferred embodiment of the centrifugal separator, the plate pack and the one or more than one further plate pack ditfer from one another with respect to at least one of a number of plates and a curvature of the plates.
In a further preferred embodiment of the centrifugal separator, the centrifugal separator further comprises at least one flow homogeniser arranged in the housing, wherein the flow homogeniser is configured to guide fluid in an outward radial direction relative to the carrier within the housing while said fluid flows from the fluid inlet towards the fluid outlet.
In a further preferred embodiment of the centrifugal separator, the centrifugal separator further comprises at least one flow homogeniser arranged in the housing, wherein the flow homogeniser is configured to guide fluid in an outward radial direction relative to the carrier toward an inner wall of the housing, while said fluid flows from the fluid inlet towards the fluid outlet.
In a further preferred embodiment of the centrifugal separator, the at least one flow homogeniser comprises a plate extending radially outward relative to the carrier, said plate having an outer edge arranged at a radial offset relative to the inner wall of the housing.
In a further preferred embodiment of the centrifugal separator, the at least one flow homogeniser is arranged adjacent to at least one of the coarse separation section and the fine separation section.
In a further preferred embodiment of the centrifugal separator, the at least one flow homogeniser is arranged downstream of said at least one of the coarse separation section and the fine separation section.
In a further preferred embodiment of the centrifugal separator, at least one of the coarse separation section and the fine separation section comprises at least one subsection, and the at least one flow homogeniser is arranged adjacent to said at least one subsection.
In a further preferred embodiment of the centrifugal separator, the at least one flow homogeniser is arranged downstream of said subsection.
In a further preferred embodiment of the centrifugal separator, wherein the at least one flow homogeniser comprises a plurality of perforations.
The one or more than one perforations in the flow guide(s) ensure a substantially continuous fluid flow along the entire cross-section of the separator, and in particular avoids the formation of so-called “dead zones” (i.e. areas adjacent to the flow homogenisers where the longitudinal fluid flow is minimal or absent). Moreover, the perforations may also serve as a degassing means allowing gas dissolved in the fluid to escape from the interior of the centrifugal separator; thereby preventing gas accumulations from forming within the interior of the centrifugal separator.
In a further preferred embodiment of the centrifugal separator according to the present disclosure, each plate of the plurality of plates comprises at least one support extending transverse to a surface of the plate and in a circumferential direction relative to the axial axis of the carrier, to thereby provide circumferential support for said plate when the support of said plate is supported on an adjacent plate of the plurality of plates during rotation of the carrier, wherein the plurality of plates comprises at least plates of a first type and plates of a second type and the plates of the first type have their respective at least one support arranged at a first radial distance relative to the carrier and the plates of the second type have their respective at least one support arranged at a second radial distance relative to the carrier, said second radial distance being different from the first radial distance.
In a further preferred embodiment of the centrifugal separator according to the present disclosure, each plate of the plurality of plates comprises at least one support extending transverse to a surface of the plate and in a circumferential direction relative to the axial axis of the carrier, to thereby provide circumferential support for said plate when the support of said plate is supported on an adjacent plate of the plurality of plates during rotation of the carrier, wherein the supports are disposed on their respective plates, approximately one behind the other in an at least partially circumferential direction relative to the axial axis of the carrier, to thereby form at least one array of supports non-concentric with the rotatable carrier and at least partially extending outward relative thereto.
The hereabove stated objective is the present disclosure is moreover achieved with a method for separating one or more particulate components suspended in a fluid, comprising usage of a centrifugal separator in accordance with the present disclosure.
The centrifugal separator according to the present disclosure will be elucidated here below with reference to the appended drawing, in which:
Fig. 1 shows a cutaway perspective view of a centrifugal separator according to a main embodiment of the present disclosure;
Fig. 2 shows a cross-sectional view of the embodiment of the centrifugal separator of Fig.
L;
Fig. 3 depicts a deposit of precipitated particulate components within the centrifugal separator of Fig. 2;
Fig. 4 shows a cross-sectional view of the centrifugal separator according to a further embodiment.
Fig. 5 illustrates deposition of precipitated particulate components within the centrifugal separator of Fig. 4;
Fig. 6 depicts an example of a configuration of a plurality of plates comprised by the centrifugal separator according to the present disclosure; and
Fig. 7 depicts a further example of configuration of a plurality of plates comprised by the centrifugal separator according to the present disclosure.
Referring now to Fig. 1, there is depicted a centrifugal separator 1 for separating one or more suspended particulate components from a fluid.
The centrifugal separator 1 comprises a substantially cylindrical housing 5 having a fluid inlet 7 and a fluid outlet 9. In the depicted exemplary embodiment of the centrifugal separator 1, the fluid outlet 9 surrounds the fluid inlet 7 and rotates around this fluid inlet 7 during operation of the centrifugal separator 1, while the fluid inlet 7 maintains a substantially stationary position.
Fluid having one or more than one suspended particulate component (e.g. solid matter, algae or the like) to be separated therefrom is introduced into the housing 5 via fluid inlet 7. Inside the housing 5, this fluid and the particulate component(s) suspended therein are induced to perform a rotation motion by first impellers 6A, before said fluid flows onward to one or more brush packs 11 and one or more plate packs 17. Before exiting the housing via fluid outlet 9, the rotating fluid is deaccelerated by second impellers 6B, which extract the rotating kinetic energy from the fluid. It 5 is noted that first and second impellers 6A, GB do not necessarily separate particulate components from the fluid, but primarily serve to respectively accelerate and deaccelerate the fluid, which enhances the overall efficiency of the centrifugal separator 1.
The centrifugal separator 1 moreover comprises a carrier 3 concentrically arranged within the housing 5 and rotatable around a central axis thereof. The hereabove described first impellers 6A and second impellers 6B may be connected to the carrier 3. A drive 4 may be provided for driving the carrier 3. The brush pack 11 and the plate pack 17 are arranged within the housing 5 along a length of the carrier 3.
The brush pack 11 is preferably arranged downstream of the fluid inlet 7 and comprises a plurality of bristles 13. Each bristle 13 is preferably flexible and extends radially outward from the carrier 3 towards the inner wall of housing 5. During operation of the centrifugal separator 1 the rotating fluid flows in between the bristles 13 and particles suspended in this fluid are caught by these bristles 13, where they remain. As such, these (typically relatively heavy) particles are separated from the fluid in which they were suspended.
Downstream of the brush pack 11, there is arranged a plate pack 17. The plate pack 17 comprises a plurality of plates 19 that extend in an axial direction of, and in a radial outward direction relative to, the axial axis of the carrier 3, preferably to the inner wall of housing 5. Like the hereabove described bristles 13, the plurality of plates 19 of the plate pack 17 rotate along with the carrier 3 during operation of the centrifugal separator 1.
The resultant centrifugal force acting on the suspended particulate components causes the particles of said suspended particulate components to drift towards a side of the housing 5. Here, and in between the plates 19 of the plate pack 17, these particulate components accumulate and are therefore separated from the fluid. Lastly, the fluid — which is now substantially free of particulate components — exits the housing via fluid outlet 9 after having been deaccelerated by the second impeller 6B.
The basic operation of the centrifugal separator 1 according to the embodiment of Fig. 1 will be described here below.
Fluid comprising one or more than one particulate component to be separated therefrom enters the interior of the housing 5 via the fluid inlet 7. Here, the fluid is accelerated and subjected to a centrifugal force by first impeller 6A and flows onward towards the brush pack 11. As the fluid flows transversely to the bristles 13 of the brush pack 11 along the length of the carrier 3,
particles that are suspended in this fluid drift in a direction away from the carrier 3 in dependency of their specific weight.
A substantial portion of these particles — in particular relatively heavy particles — remain in between the bristles 13 while the fluid flows onwards in the direction of the plate pack 17. Upon arrival at the plate pack 17, remaining particles suspended in the fluid are still subject to the centrifugal force and therefore drift towards or away from the carrier 3. These remaining particles come into contact with either one of the plates 19 or an interior surface of the housing 5, where they settle and are thus separated from the liquid. In particles having a relatively low specific mass, which were previously not separated from the fluid by the brush pack 11, may be separated from the fluid here by the plate pack 17.
The hereabove described configuration and operation of the centrifugal separator 1 constitutes several advantages relative to comparable devices known from the prior-art. Firstly, centrifugal separator 1 can separate both relatively heavy particles and relatively light particles from a fluid in a single run through the centrifugal separator 1. The centrifugal separator 1 is therefore particularly well suited for separating mixtures of both heaving and light suspended particulate components from a fluid. Secondly, because relatively heavy particles are predominantly separated from the fluid in the coarse separation section 15 of the centrifugal separator 1 whereas relatively light particles are predominantly separated from the fluid in the fine separation section 21, the separated particles are deposited substantially along the entire length of the housing 5 of the centrifugal separator 1; with no excessive locally concentrated accumulation of separated material being formed. Examples of such depositions of separated particles are depicted in Fig. 3 and Fig. 5 for further embodiments of the centrifugal separator 1. Consequently, the capacity of centrifugal separator 1 is utilized to an improved degree.
Fig. 2 shows a more preferred embodiment of a centrifugal separator 1. This embodiment of the centrifugal separator 1 differs from the embodiment depicted in Fig. 1 at least by the centrifugal separator 1 additionally comprising two flow homogenisers 23, 23°. Each flow homogeniser 23, 23° is arranged within the housing 5 downstream of respectively the coarse separation section 15 and the fine separation section 21. While Fig. 2 does not depict the hereabove described first impeller 6A and second impeller 6B, these first and second impellers 6A, 6B are preferably nevertheless present in the embodiments of the centrifugal separator 1 according to Fig. 2 and all subsequent figures.
In the embodiment of the centrifugal separator 1 according to Fig. 2. fluid having one or more than one particulate components first enters the housing 5 of the centrifugal separator 1 via fluid inlet 7. As said fluid flows through the coarse separation section 15 having the brush pack 11, particles are removed from said fluid as described hereabove with reference to Fig. 1. The fluid flow having at least some remaining particulate components suspended therein then flows towards the flow homogeniser 23, which is arranged directly downstream of the coarse separation section 15. The flow homogeniser 23 forcefully guides the fluid to flow around the flow homogeniser 23 at an increased velocity and distance relative to axial axis of the carrier 3, in the space between the interior of the housing 5 and an edge 24 of the flow homogeniser 23.
Here, remaining particulate components that were thus far not separated from the fluid are engaged to a greater extent by the centrifugal force generated by centrifugal separator 1, which causes their precipitation rate (i.e. their outward drift speed) to increase atter having passed the flow homogeniser 23. A distance between the edge 24 of the flow homogeniser 23 and he interior wall of the housing 5 may be selected in consideration of, for example, the relative mass of the particles to be separated from the fluid or the viscosity of said fluid.
As the fluid flows onward along the plurality of plates 19 comprised by the fine separation section 21, more particles are separated from the fluid as described hereabove with reference to
Fig. 1. The flow homogeniser 23° that is arranged directly downstream of the fine separation section 21 then likewise forces the fluid flow around the flow homogeniser 23° at an increased radius relative to the axial axis of the carrier 3. As is described hereabove with reference to the flow homogeniser 23, the few remaining particles that are still suspended in the fluid — in particular particles having a density that is close to the density of the fluid in which they are suspended — experience an increased precipitation rate in the vicinity of the flow homogeniser 23’ before leaving the housing 5 via the fluid outlet 9.
As can be discerned from Fig. 2, the flow homogenisers 23 and 23° each comprise a plate extending radially outward relative to the carrier 3 up to an intermediate distance from an interior surface of the housing 5. Within the context of the present disclosure, the term “plate” should be interpreted broadly: while the appended figures depict these plates as being substantially flat, it is entirely conceivable that alternative shapes are selected in consideration of, for example, optimising a fluid flow throughput of the centrifugal separator 1.
In other words, the flow homogenisers 23, 23° ensure that the longitudinal fluid flow is (more) homogenised across the entire cross-section of the of the centrifugal separator 1, because the flow homogenisers 23, 23° counteract the tendency of the fluid to drift towards the carrier 3 due to the fluid’s low specific mass relative to the particulate components, and to instead flow longitudinally along the carrier 3.
Each of the flow homogenisers 23, 23’ moreover preferably comprises one or more than one perforation 8. The purpose of these perforations 8 is twofold.
Firstly. these perforations 8 facilitate at least some of the fluid to flow closer to the carrier 3 in the longitudinal, in addition to flowing between the edges 24 of each of the flow homogenisers 23,23 and the inner wall of the housing 5 as described hereabove
While the guides 23, 23° induce the fluid to flow longitudinally at an increased distance relative to the carrier 3, this tends to result in the formation of so-called “dead zones” within the centrifugal separator 1 with poor longitudinal fluid flow. The perforations 8 prevent these “dead zones” by allowing at least some fluid flow to flow through the flow homogenisers 23, 23°, which 53 further improves the functioning of the centrifugal separator 1.
Secondly, the perforations 8 provide a means to vent gasses from the housing 5 when the fluid is a liquid. Such gasses may be dissolved in the liquid flowing into the centrifugal separator 1 and, due to their relatively low mass, drift toward the carrier 3 in between the flow homogenisers 23, 23’ where they accumulate. The perforations 8 provide an outlet for these accumulating gasses, allowing them to flow onward in the direction of the outlet 9 and thereby prevent these accumulations of gasses from becoming excessive.
Like the embodiment of the centrifugal separator 1 depicted in Fig. 1, the separator according to the embodiment of Fig. 2 is particularly suitable for ridding the fluid of mixtures of particular components with varying specific masses. Particles having a relatively high specific mass are predominantly separated from the fluid in the coarse separation section 15, whereas particles having a relatively low specific mass are predominantly separated from the fluid in fine separation section 21. The flow homogenisers 23 and 23’ arranged downstream of, respectively, the coarse separation section 15 and the fine separation section 21 to further increased the precipitation rate of particles, as described hereabove. As a result, the particles precipitate along substantially the entire length of the housing 5 with an increased degree of homogeneity as depicted in Fig. 3. Consequently, usage of the capacity of the housing 5 is improved relative to prior-art centrifugal separators and the centrifugal separator 1 according to the present disclosure requires emptying on a less frequent basis.
Referring now to Fig. 4, there is depicted a further embodiment of the centrifugal separator 1 according to the present disclosure. In this embodiment, the centrifugal separator 1 comprises a further brush pack 11° arranged downstream of the brush pack 11. Here, the brush pack 11 and the one or more than one further brush pack 11° define subsections 15’ and 15° of the overall coarse separation section 15. A flow homogeniser 23 is disposed in between the aforementioned subsections 15°, 157 and a further flow homogeniser 23 is arranged downstream of subsection 15” of the coarse separation section 15.
The subsection 15° of the coarse separation section 15 having the brush pack 11 may be configured to predominantly separate particular components from the fluid having a specific mass different from less coarse particles that are separated from the fluid in the further subsection 15° having the additional brush 117°. Consequently, the particulate components that are separated from the fluid are disposed along substantially the entire length of the separation section 15.
The brush pack 11 and the further brush pack 11° of the two subsections 15°, 15°’ may differ from one another with respect to a total number of bristles 13, 13° comprised by each brush pack 11, 11°. Moreover, they may differ from one another with respect to a bristle density (i.e. number of bristles per unit of surface area) comprised by each respective one of the brush pack 11 and the further brush pack 11°. The brush pack 11 and the further brush pack 11° may additionally differ from one another with respect to a thickness of the (individual) bristles 13, 13’.
The centrifugal separator 1 depicted in Fig. 4 moreover comprises a further plate pack 17° arranged downstream of the plate pack 17. The plate pack 17 and the further plate pack 17° respectively comprise pluralities of plates 19, 19° and define distinct subsections 21°, 21°’ of the overall fine separation section 21 of the centrifugal separator 1.
The plate packs 17, 17’ may likewise differ from one another with respect to their capacity of separating particular components from the fluid. For example, fine particles having a relatively high specific mass may be predominantly precipitate in the subsection 21 having the brush pack 11, whereas fine particles having a relatively low specific mass may predominantly precipitate in the subsection 21°’ having the further plate pack 17°,
The plate pack 17 and the further plate pack 17° may differ from one another with respect to one or more of a number and a curvature of the plates 19, 19’ comprised by the respective plate packs 17, 17’.
Fig. 5 shows an example of a deposition of separated material (i.e. particulate components) within the housing 5, when the centrifugal separator 1 is substantially full and ready to be emptied.
As can be discerned from this figure, the above described features of the centrifugal separator 1 result in this material being precipitated along substantially the entre length of the housing 5.
While local accumulations of precipitated material are formed on either side of each of the of the flow homogenisers 23, 23’, precipitation of separated material is still relatively homogenous; with no excessive accumulation of precipitated material that would inhibit operation of the centrifugal separator 1 being present. As such, the capacity of the centrifugal separator 1 is optimised and requires emptying on a less frequent basis in comparison to known prior-art centrifugal separators.
Fig. 6 and Fig. 7 respectively depict alternative configurations of the plurality of plates 19 comprised by the plate pack 17 and/or the further plate pack 17° of the foregoing figures.
Fig. 6 depict a configuration of a plurality of plates 19 according to a first embodiment. As can be discerned from this figure, the plates 19 extend from the carrier 3 towards an inner surface of the housing 5 and may be connected to the carrier 3 by means of a pivoting connector 28. The plates 19 furthermore comprise a curvature with a plurality of supports 27 arranged on respective concave surfaces of the plates 19. Each support 27 extends transverse to said surface of the plates 19 and in a circumferential direction relative to the axial axis of the carrier 3. As such, the supports 27 provide circumferential support for said plate 19 when the support 27 of said plate 19 is supported on an adjacent plate 19 of the plurality of plates 19 during rotation of the carrier 3. The supports 27 on each plate 19 maintain intermittent distances between consecutive plates 19 and prevent deformation of the plates 19 during operation of the centrifugal separator 1.
In Fig. 6, each of the plurality of plates 19 is substantially identical with respect to at least the curvature and the arrangement of the supports. Consequently, the respective supports 27 of consecutive plates 19 form circular formations 29 concentric with the carrier 3, which absorb the significant centrifugal forces that are generated during operation of the centrifugal separator 1.
It is emphasised here that each of the plurality of plates 19 may exhibit a curvature in either one or both of two different directions, these directions being substantially parallel to a rotational direction of the carrier 3 and substantially parallel to a longitudinal direction of the carrier 3. As such, the scope of the present disclosure with respect to the curvature of the plurality of plates 19 is not limited to the exemplary embodiments of the appended figures. Indeed, it is entirely conceivable that the each of the plurality of plates 19 in addition or alternatively exhibits a curvature substantially parallel to a longitudinal direction of the carrier 3, to thereby define for example a corkscrew-like shape of the plates 19.
Fig. 7 depict a further configuration of a plurality of plates 19 according to a second embodiment. In this embodiment, the plurality of plates 19 comprises at least plates of a first type 19” and plates of a second type 19”.
The plates 19 ‘of the first type have their respective at least one support 27 arranged at a first radial distance relative to the carrier 3 and the plates 19°’ of the second type have their respective at least one support 27 arranged at a second radial distance relative to the carrier 3, said second radial distance being different from the first radial distance. Other than the respective arrangements of the supports 27, the plates 19° of the first type and the plates 19°” of the second type may be substantially identical to one another.
Consequently, in this embodiment the respective supports 27 of consecutive plates 19°, 19" form formations 29 that are not concentric with the axial axis of the carrier 3, but instead extend at least partially outward from the carrier 3 in the direction of the housing 5. These formations 29 of the respective supports 27 of consecutive plates 19, 19°’ have been determined to more capable of absorbing the — often very significant — centrifugal forces that are generated during operation of the centrifugal separator 1. As a result thereof, deformation of the plates 19°, 19°’ is less likely to occur and the centrifugal separator 1 may operate at a higher rotation speed.
Moreover, the (plurality of plates 19°, 197’ of the) centrifugal separator 1 may be scaled up to increased physical dimensions or be constructed using less stiff materials while maintaining the mechanical rigidity of plates 19, 19°’.
The supports 27 disposed on their respective plates 19°, 19°" may alternatively be considered to be arranged approximately one behind the other in an at least partially circumferential direction relative to the axial axis of the carrier 3, to thereby form at least one array 29 of supports 27 non-concentric with the rotatable carrier 3 and at least partially extending outward relative thereto.
The present disclosure has thus far been elucidated with reference to the centrifugal separator 1 according to various embodiments. Nevertheless, the present disclosure moreover relates to a method for separating one or more particulate components suspended in a fluid, said method comprising usage of a centrifugal separator 1 according to any one or more of the embodiments described hereabove.
The present disclosure proposes various improvements with which centrifugal separators may be improved with respect to their capacity of separating particulate components from fluid and their capacity of retaining these particulate components before needing to be emptied. While these improvements have been elucidated hereabove with reference to the various embodiments depicted in the appended drawing, the skilled person will acknowledge that the features of these different embodiments can be combined with one another. For example, the embodiments of the centrifugal separator according to Fig. 2 and 4 may also comprise the drive 4 and/or first and second impellers 6A, 6B of the embodiment of the centrifugal separator depicted in Fig. 1. Likewise, the embodiment of the centrifugal separator 1 according to Fig. 1 may also comprise e.g. the flow homogenisers 23, 23° described in conjunction with Fig. 3 and Fig. 5.
The scope of protection for the present disclosure therefore is by no means limited to the actually disclosed and potentially preferred embodiments as depicted in the appended drawing.
Many alternative and additional features and aspects are possible within the framework of the present disclosure and of the appended independent and dependent claims. The scope of protection should therefore not be construed as being limited to any one of the embodiments of the present disclosure as described hereabove or as depicted in the appended drawing, but is instead defined solely by the features of the appended claims and, at least in certain jurisdictions, their equivalents.

Claims (16)

CONCLUSIESCONCLUSIONS 1. Een centnifugaalafscheider voor het scheiden van één of meer gesuspendeerde deeltjesvormige componenten uit een fluïdum, de centrifugaalafscheider omvattende: - een drager, die roteerbaar is rond een axiale as daarvan en is opgesteld in een behuizing omvattende een fluïduminlaat en een fluidumuitlaat; - waarbij de centrifugaalafscheider verder omvat: - een borstelpakket met een aantal borstelharen die zich in een radiaal buitenwaartse richting uitstrekken ten opzichte van de axiale as van de drager, waarbij genoemde borstel een grove scheidingssectie definieert; en - een platenpakket omvattende een aantal platen, welke zich uitstrekken in een axiale richting van, en in een radiaal buitenwaartse richting ten opzichte van, de axiale as van de drager, waarbij genoemd platenpakket een fijne scheidingssectie definieert.A centrifugal separator for separating one or more suspended particulate components from a fluid, the centrifugal separator comprising: - a carrier rotatable about an axial axis thereof and arranged in a housing comprising a fluid inlet and a fluid outlet; - wherein the centrifugal separator further comprises: - a brush pack with a number of bristles extending in a radially outward direction relative to the axial axis of the carrier, said brush defining a coarse separation section; and - a plate pack comprising a number of plates extending in an axial direction from, and in a radially outward direction relative to, the axial axis of the carrier, said plate pack defining a fine separation section. 2. Centrifagaalafscheider volgens conclusie 1, waarbij het aantal platen, welke de fijne scheidingssectie definieert, stroomafwaarts van de borstel is aangebracht, welke de grove scheidingssectie definieert.A centrifugal separator according to claim 1, wherein the plurality of plates defining the fine separation section are arranged downstream of the brush defining the coarse separation section. 3. Centrifugaalafscheider volgens conclusie 1 of 2, verder omvattende één of meer dan één aanvullend borstelpakket, welke stroomafwaarts van het borstelpakket is aangebracht, waarbij het borstelpakket en het éne of meer dan éne aanvullende borstelpakket deelsecties van de grove afscheidingssectie definiëren.3. Centrifugal separator according to claim 1 or 2, further comprising one or more additional brush packages, which are arranged downstream of the brush package, wherein the brush package and the one or more additional brush packages define sub-sections of the coarse separation section. 4. Centrifugaalafscheider volgens conclusie 3, waarbij het borstelpakket en het éne of meer dan éne aanvullende borstel pakket van elkaar verschillen met betrekking tot ten minste één van: - een aantal borstelharen; - een dichtheid van de borstelharen; en - een dikte van de borstelharen.4. Centrifugal separator according to claim 3, wherein the brush package and the one or more additional brush packages differ from each other with respect to at least one of: - a number of bristles; - a density of the bristles; and - a thickness of the bristles. 5. Centrifugaalafscheider volgens één of meer dan één van de voorgaande conclusies, verder omvattende één of meer dan één aanvullend platenpakket, welke stroomafwaarts van het platenpakket is aangebracht, waarbij het platenpakket en het éne of meer dan éne aanvullende platenpakket deelsecties van de fijne afscheidingssectie definiëren.5. Centrifugal separator according to one or more of the preceding claims, further comprising one or more additional plate packs, which are arranged downstream of the plate pack, wherein the plate pack and the one or more additional plate packs define sub-sections of the fine separation section . 6. Centrifugaalafscheider volgens conclusie 5, waarbij het platenpakket en het éne of meer dan éne aanvullende platenpakket van elkaar verschillen met betrekking tot ten minste één van:s - een aantal platen; en - een kromming van de platen.6. Centrifugal separator according to claim 5, wherein the plate pack and the one or more additional plate packs differ from each other with respect to at least one of: s - a number of plates; and - a curvature of the plates. 7. Centrifugaalafscheider volgens een willekeurige van de voorgaande conclusies, verder omvattende ten minste één in de behuizing opgestelde stromingshomogenisator, waarbij de stroomhomogenisator is ingericht voor het geleiding van stroming in een buitenwaartse radiale richting ten opzichte van de drager naar een binnenwand van de behuizing, terwijl genoemd fluidum van de fluïduminlaat naar de fluidumuitlaat stroomt.7. Centrifugal separator according to any of the preceding claims, further comprising at least one flow homogenizer arranged in the housing, wherein the flow homogenizer is designed to guide flow in an outward radial direction relative to the carrier to an inner wall of the housing, while said fluid flows from the fluid inlet to the fluid outlet. 8. Centrifugaalafscheider volgens conclusie 7, waarbij de ten minste éne stromingshomogenisator een plaat omvat, welke zich radiaal naar buiten uitstrekt ten opzichte van de drager, waarbij genoemde plaat een buitenste rand omvat die is aangebracht op een radiale afstand ten opzichte van de binnenwand van de behuizing.8. Centrifugal separator according to claim 7, wherein the at least one flow homogenizer comprises a plate which extends radially outward with respect to the carrier, said plate comprising an outer edge arranged at a radial distance from the inner wall of the housing. 9. Centrifugaalafscheider volgens conclusie 7 of 8, waarbij de ten minste éne stromingshomogenisator aangrenzend aan ten minste één van de grove afscheidingssectie en de fijne afscheidingssectie is aangebracht.9. Centrifugal separator according to claim 7 or 8, wherein the at least one flow homogenizer is arranged adjacent to at least one of the coarse separation section and the fine separation section. 10. Centrifagaalafscheider volgens conclusie 9, waarbij de ten minste éne stromingshomogenisator stroomafwaarts van genoemde ten minste éne grove afscheidingssectie en de fijne afscheidingssectie is aangebracht.10. Centrifugal separator according to claim 9, wherein the at least one flow homogenizer is arranged downstream of said at least one coarse separation section and the fine separation section. 11. Centrifugaalatscheider volgens een willekeurige van de voorgaande conclusies 7 — 10, waarbij ten minste één van de grove afscheidingssectie en de fijne afscheidingssectie ten minste één deelsectie omvat, en waarbij de ten minste éne stromingshomogenisator aangrenzend aan genoemde ten minste éne deelsectie is aangebracht.11. Centrifugal separator according to any of the preceding claims 7 - 10, wherein at least one of the coarse separation section and the fine separation section comprises at least one sub-section, and wherein the at least one flow homogenizer is arranged adjacent to said at least one sub-section. 12. Centrifugaalafscheider volgens conclusie 11, waarbij de ten minste éne stromingshomogenisator stroomafwaarts van genoemde deelsectie is aangebracht.12. Centrifugal separator according to claim 11, wherein the at least one flow homogenizer is arranged downstream of said sub-section. 13. Centrifugaalafscheider volgens een willekeurige van de voorgaande conclusies 7 — 12, waarbij de ten minste éne stromingshomogenisator een aantal perforaties omvat.13. Centrifugal separator according to any of the preceding claims 7 - 12, wherein the at least one flow homogenizer comprises a number of perforations. 14. Centrifugaalatscheider volgens een willekeurige van de voorgaande conclusies, waarbij elke van het aantal van platen ten minste één steun omvat, die zich dwars op een oppervlak van de plaat en in een omtreksrichting ten opzichte van de axiale as van de drager uitstrekt, om daardoor een omtreksteun te verschaffen voor genoemde plaat, wanneer de steun van genoemde plaat wordt ondersteund op een naburige plaat van het aantal platen tijdens rotatie van de drager, en waarbij het aantal platen ten minste platen van een eerste type en platen van een tweede type omvat en de platen van het eerste type hun respectievelijke ten minste éne steun op een eerste radiale afstand ten opzichte van de drager omvatten, en de platen van het tweede type hun respectievelijke ten minste éne steun op een tweede radiale afstand ten opzichte van de drager omvatten, waarbij genoemde tweede radiale afstand anders is dan de eerste radiale afstand.14. Centrifugal separator according to any one of the preceding claims, wherein each of the plurality of plates comprises at least one support, which extends transversely to a surface of the plate and in a circumferential direction with respect to the axial axis of the support, thereby to provide a peripheral support for said plate, when the support of said plate is supported on an adjacent plate of the plurality of plates during rotation of the carrier, and wherein the plurality of plates comprises at least plates of a first type and plates of a second type and the plates of the first type comprise their respective at least one support at a first radial distance relative to the carrier, and the plates of the second type comprise their respective at least one support at a second radial distance relative to the carrier, wherein said second radial distance is different from the first radial distance. 15. Centrifugaalafscheider volgens een willekeurige van de voorgaande conclusies, waarbij elke van het aantal van platen ten minste één steun omvat, die zich dwars op een oppervlak van de plaat en in een omtreksrichting ten opzichte van de axiale as van de drager uitstrekt, om daardoor een omtreksteun te verschaffen voor genoemde plaat, wanneer de steun van genoemde plaat wordt ondersteund op een naburige plaat van het aantal platen tijdens rotatie van de drager, en waarbij de steunen op hun respectieve platen in hoofdzaak achter elkaar, in een ten minste gedeeltelijke omtreksrichting ten opzichte van de axiale as van de drager, zijn aangebracht om daardoor ten minste één Tij steunen te vormen, die niet-concentrisch met de roteerbare drager is en zich ten minste gedeeltelijk buitenwaarts uitstrekt ten opzichte daarvan.15. Centrifugal separator according to any one of the preceding claims, wherein each of the plurality of plates comprises at least one support, which extends transversely to a surface of the plate and in a circumferential direction with respect to the axial axis of the carrier, thereby to provide a peripheral support for said plate, when the support of said plate is supported on an adjacent plate of the plurality of plates during rotation of the carrier, and wherein the supports on their respective plates are substantially one behind the other, in an at least partially circumferential direction relative to the axial axis of the carrier, are arranged to thereby form at least one Tij supports, which is non-concentric with the rotatable carrier and extends at least partially outwardly with respect thereto. 16. Een werkwijze voor het scheiden van een of meer deeltjesvormige componenten gesuspendeerd in een fluïdum, omvattende het gebruik van een centrifugaalafscheider volgens een willekeurige van de voorgaande conclusies.A method for separating one or more particulate components suspended in a fluid, comprising the use of a centrifugal separator according to any of the preceding claims.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999051353A1 (en) * 1998-04-02 1999-10-14 Alfa Laval Ab Rotor for centrifugal separator
WO2009005355A1 (en) * 2007-07-03 2009-01-08 Evodos B.V. Separating device and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999051353A1 (en) * 1998-04-02 1999-10-14 Alfa Laval Ab Rotor for centrifugal separator
WO2009005355A1 (en) * 2007-07-03 2009-01-08 Evodos B.V. Separating device and method

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