EP3320976A1 - Dispositif d'insertion pour une centrifugeuse décanteuse - Google Patents

Dispositif d'insertion pour une centrifugeuse décanteuse Download PDF

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Publication number
EP3320976A1
EP3320976A1 EP16198937.1A EP16198937A EP3320976A1 EP 3320976 A1 EP3320976 A1 EP 3320976A1 EP 16198937 A EP16198937 A EP 16198937A EP 3320976 A1 EP3320976 A1 EP 3320976A1
Authority
EP
European Patent Office
Prior art keywords
channel
inlet device
outlet opening
inlet
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16198937.1A
Other languages
German (de)
English (en)
Other versions
EP3320976B1 (fr
Inventor
Mark Nägeli
Roger Salzmann
Marc Zubler
Manuel Mathys
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferrum Process Systems AG
Original Assignee
Ferrum AG
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 Ferrum AG filed Critical Ferrum AG
Priority to EP16198937.1A priority Critical patent/EP3320976B1/fr
Priority to JP2017210004A priority patent/JP7061863B2/ja
Priority to US15/799,300 priority patent/US20180133723A1/en
Priority to CN201711091574.4A priority patent/CN108067357B/zh
Publication of EP3320976A1 publication Critical patent/EP3320976A1/fr
Application granted granted Critical
Publication of EP3320976B1 publication Critical patent/EP3320976B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • 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
    • 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
    • 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
    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B2001/2033—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl with feed accelerator inside the conveying screw

Definitions

  • the invention relates to an inlet device for a decanter centrifuge according to the preamble of independent claim 1.
  • the invention further relates to a centrifuge drum for a decanter centrifuge according to claim 14 and a decanter centrifuge according to claim 15.
  • Decanter centrifuges comprise a rotating centrifuge drum and a conveying element co-rotating with the centrifuge drum, which is located inside the centrifuge drum.
  • the conveying element is designed as a helical hollow shaft and extends at least partially over the length of the centrifuge drum.
  • the starting material is introduced in the form of a suspension via a feeder tube of the decanter centrifuge in the hollow shaft and discharged through openings on the peripheral surface of the hollow shaft in a filling zone to the centrifuge drum and centrifuged out.
  • the centrifuge drum has a closed lateral surface on which the solids content in the centrifugal field settles to a cake, which is conveyed by the helical conveying element in the axial direction and ejected via an outlet device.
  • an inlet device is now arranged in the hollow shaft.
  • a known inlet device comprises an inlet opening, via which the starting product can be introduced into the inlet device.
  • the inlet device comprises at least a first outlet opening and a second outlet opening different from the first outlet opening for feeding the starting product from the inlet device into the filling zone.
  • the inlet opening is flow-connected to the first outlet opening and the second outlet opening via a connecting device.
  • Fig. 1 To explain this inlet device is hereinafter referred to the Fig. 1 With reference to which the previously described prior art will be described in more detail. To distinguish the prior art from the present invention, the reference numerals referring to features of known examples are provided with a single decimal, while features of embodiments according to the invention are provided with reference numerals that do not carry apostrophes.
  • Fig. 1 shows a sectional view of a centrifuge drum 9 'of a decanter centrifuge (not shown) with a conveying element 10' and a known inlet device 1 '.
  • the centrifuge drum 9 ' is rotatably mounted in the decanter centrifuge via bearing elements 11'.
  • the co-rotating conveyor element 10' is also mounted rotatably via bearing elements 11 '.
  • the conveying element 10 ' is designed as a helical hollow shaft and extends at least partially over the length of the centrifuge drum 9'.
  • the starting product is introduced in the form of a suspension via a feed tube 12 'of the decanter centrifuge in the hollow shaft and discharged through openings on the peripheral surface of the hollow shaft in a filling zone 13' to the centrifuge drum 9 'and centrifuged out.
  • the centrifuge drum 9 ' has a closed lateral surface on which the solids content in the centrifugal field settles to a cake, which is conveyed by the screw-shaped conveying element 10 'in the axial direction and ejected via an outlet device.
  • a known inlet device 1' is arranged in the hollow shaft.
  • the known inlet device 1 ' comprises an inlet opening 2', via which the starting product is introduced into the inlet device 1 '.
  • the inlet opening 2 ' extends coaxially to a longitudinal axis 14' of the inlet device 1 '.
  • the inlet device 1 ' comprises a first outlet opening 301' and a second outlet opening (not shown) different from the first outlet opening 301 for feeding the starting product from the inlet device 1 'into the filling zone 13' of the decanter centrifuge.
  • the first outlet opening 301 'and the second outlet opening are arranged radially to the longitudinal axis 14'.
  • the inlet opening 2 ' is flow-connected to the first outlet opening 301' and the second outlet opening via a connection device 4 'of the inlet device 1'.
  • the connecting device 4 ' is designed in the form of a channel which directs the starting product from the inlet opening 2' to the first outlet opening 301 'and the second outlet opening.
  • the starting product is introduced from the feeder tube 12 'of the decanter centrifuge via the inlet 2' into the inlet device 1 '.
  • the starting product collects in the connecting device 4 'and is then fed into the filling zone 13' via the first outlet opening 301 'and the second outlet opening due to the rotation of the inlet device 1'.
  • the starting product is thus deflected in the connecting device 4 'from an axial to a radial direction.
  • a major disadvantage of the inlet device described is that the starting material is fed inhomogeneous in the circumferential direction of the centrifuge drum in the filling zone of the decanter centrifuge. As a result, the starting product in the filling zone to the centrifuge drum is discharged unevenly and centrifuged out. As a result, the cake settling on the inner surface of the centrifuge drum has a varying thickness in the circumferential direction of the centrifuge drum.
  • the starting product in the known inlet device is exposed to increased turbulence, which is accompanied by additional flow losses and vibrations.
  • the object of the invention is to provide an inlet device for a decanter centrifuge, by means of which the starting product in the circumferential direction of the centrifuge drum optimized, in particular homogeneously or evenly distributed, can be fed into the filling zone of the decanter centrifuge.
  • the invention thus relates to an inlet device for feeding a starting product into a filling zone of a decanter centrifuge, comprising an inlet opening for introducing the starting product into the inlet device, at least one first outlet opening and a second outlet opening different from the first outlet opening for feeding the starting product from the inlet device into the filling zone , and a connecting device, via which the inlet opening is flow-connected to the first outlet opening and the second outlet opening.
  • the connecting device comprises a first channel and a second channel different from the first channel, wherein the first outlet opening is flow-connected to the inlet opening via the first channel and the second outlet opening is flow-connected to the inlet opening via the second channel.
  • the term "flow-connected" means that the first channel and the second channel are designed such that the starting product flowing into the inlet device can be distributed at least partially independently of one another to the first outlet opening and the second outlet opening.
  • the first channel and / or the second channel may at least partially extend from the first outlet opening and / or the second outlet opening to the inlet opening. That is, the first channel and / or the second channel may extend continuously and independently from the first outlet opening and / or the second outlet opening to the inlet opening or the first channel and / or the second channel are not continuous from the first outlet opening and / or the second outlet opening formed to the inlet opening. It is also possible that the first channel and / or the second channel via the respective other channel is substantially fluidly connected to the inlet opening.
  • the connecting device is not formed by a plurality of channels but by a single channel usually in the form of the inlet device itself, which directs the starting product from the inlet opening to the first outlet opening and the second outlet opening.
  • the starting product is not selectively passed to the first outlet opening and the second outlet opening.
  • first channel and the second channel may have different cross-sectional geometries.
  • the cross section of the first channel and the second channel may be formed, for example, n-square, circular or oval. It is also possible that the cross-sectional geometry of the first channel and / or the second channel varies over the length of the respective channel.
  • the inlet opening extend coaxially to a longitudinal axis of the inlet device.
  • the first outlet opening and / or the second outlet opening may extend radially to the longitudinal axis.
  • the first channel and / or the second channel may thus extend curved to the longitudinal axis, so that by the first channel and / or the second channel substantially a targeted deflection of the starting product takes place from an axial direction in a radial direction.
  • the first outlet opening and the second outlet opening can be arranged offset along the longitudinal axis.
  • the inlet opening, the first outlet opening and the second outlet opening can lie in different planes.
  • the inlet device next to the first outlet opening and the second outlet opening have further outlet openings, which also has a separate channel are fluidly connected to the inlet opening. That is, within the scope of the invention, the inlet device may also have other channels in addition to the first channel and the second channel.
  • An essential advantage of the inlet device according to the invention is that the starting product in the circumferential direction of the centrifuge drum is optimized, in particular distributed homogeneously or evenly, into the filling zone of the decanter centrifuge. As a result, the starting product in the filling zone is discharged evenly to the centrifuge drum and centrifuged out. As a result, the cake settling on the inner surface of the centrifuge drum has a uniform thickness in the circumferential direction of the centrifuge drum.
  • the starting product is exposed in the inventive inlet device lower turbulence, which has a positive effect on the flow losses and vibrations.
  • the first channel extends continuously from the first outlet opening to the inlet opening
  • the second channel extends continuously from the second outlet opening to the inlet opening
  • the inlet device may also have a mixing chamber between the inlet opening and the first outlet opening and / or the second outlet opening, and the first channel may extend continuously from the first outlet opening to the mixing chamber, and / or the second channel may extend continuously from the second Outlet opening to extend to the mixing chamber.
  • the starting product is thereby collected in the mixing chamber before being directed into the first channel and / or the second channel. Due to this embodiment of the inlet device, an improved homogenization of the starting product takes place in the inlet device.
  • the cross-sectional area of the first channel increases from the inlet opening to the first outlet opening and / or the cross-sectional area of the second channel increases from the inlet opening to the second outlet opening.
  • first channel opens at a predeterminable angle into the first outlet opening and / or the second channel opens at a predeterminable angle into the second outlet opening, so that the first channel and / or the second channel follow a curve , This ensures a targeted feed of the starting product into the filling zone of the decanter centrifuge.
  • the inlet device additionally has a fastening element for fastening the inlet device in the filling zone.
  • a fastening element for fastening the inlet device in the filling zone.
  • About the fastener is allows a fixed or detachable attachment of the inlet device to the hollow shaft in the filling zone.
  • the fastening element may be arranged in the region of the inlet opening and / or at an end opposite the inlet opening.
  • the manufacture of the inlet device is simplified and the rigidity of the inlet device is increased.
  • the fastener may e.g. be formed as a disc. As a result, the attachment of the inlet device in the filling zone is further simplified.
  • the fastening element is connected via a support element to the first channel and / or the second channel.
  • the support element By means of the support element, the rigidity of the inlet device is increased and the first channel and / or the second channel stabilized.
  • first channel and / or the second channel are at least partially surrounded by a stabilizing element.
  • the rigidity of the inlet device can be increased and the first channel and / or the second channel can be stabilized.
  • the first outlet opening and / or the second outlet opening can be integrated in the stabilizing element.
  • the stabilizing element may be formed as a grid. As a result, the weight of the inlet device can be reduced.
  • the inlet device is produced by means of an additive method.
  • the weight of the inlet device can be significantly reduced become.
  • the additive process makes it possible to produce an inlet device with channels of complex geometry. Also, by means of the additive process, the inlet device can be produced inexpensively.
  • the present invention further relates to a centrifuge drum for a decanter centrifuge with an inlet device according to the invention and to a decanter centrifuge having an inlet device according to the invention.
  • Fig. 2a shows a first embodiment of an inventive inlet device, which is hereinafter referred to in its entirety by the reference numeral 1.
  • the in the Fig. 2a to Fig. 7 used reference numerals do not carry a single quote, since these figures relate to embodiments of the present invention.
  • the inlet device 1 comprises an inlet opening 2, a first outlet opening 301, a second outlet opening 302, a third outlet opening 303 and a fourth outlet opening 304 (in FIG 2a not shown).
  • the outlet openings 301, 302, 303, 304 are formed differently from each other.
  • the inlet port 2 serves for feeding a starting product in the filling zone of the decanter centrifuge and the outlet openings 301, 302, 303, 304 for feeding the starting product from the inlet device into the filling zone.
  • the inlet device 1 further comprises a connecting device, via which the inlet opening 2 with the first, second, third and fourth outlet opening 301, 302, 303, 304 is fluidly connected.
  • the connecting device in this case comprises a first channel 401, a second channel 402, a third channel 403 and a fourth channel 404.
  • the channels 401, 402, 403, 404 are formed differently from each other.
  • the first outlet opening 301 is via the first channel 401, the second outlet opening 302 via the second channel 402, the third outlet opening 303 via the third channel 403, and the fourth Outlet opening 304 via the fourth channel 404 with the inlet opening 2 fluidly connected.
  • the first, second, third and fourth channels 401, 402, 403, 404 each extend continuously from the first, second, third and fourth outlet openings 301, 302, 303, 304 to the inlet opening 2.
  • the first, second, third and fourth channels 401, 402, 403, 404 are formed such that the cross-sectional area of the respective channel increases from the inlet opening 2 to the first, second, third and fourth outlet openings 301, 302, 303, 304.
  • the inlet device 1 comprises a stabilizing element 8 which partially surrounds the first, second, third and fourth channels 401, 402, 403, 404.
  • the inlet device 1 also has at the other end of the inlet opening 2, a receiving element in the form of a pin 15, which for receiving a fastener 6 (FIG. 2b ) serves.
  • the inlet opening 2 extend coaxially to a longitudinal axis 14 of the inlet device 1 and the outlet opening 301, 302, 303, 304 radially to the longitudinal axis 14.
  • the first, second, third and fourth channel 401, 402, 403, 404 thus extend below a curvature to the longitudinal axis 14, so that by the first, second, third and fourth channel 401, 402, 403, 404 substantially a targeted deflection of the starting product takes place from an axial direction in a radial direction.
  • the outlet openings 301, 302, 303, 304 along the longitudinal axis 14 offset from one another.
  • Fig. 2b shows a sectional view of a conveyor element 10 with the inlet device 1 described above 2a , How out Fig. 2b can be seen, the inlet device 1 via a fastening element 6, which is formed as a disc, attached to the inner surface of the conveying element 10.
  • Fig. 3 shows a second embodiment of an inventive inlet device 1.
  • the inlet device 1 has no stabilizing element that partially surrounds the first, second, third and fourth channels 401, 402, 403, 404.
  • the inlet device 1 has a fastening element 6 at one end opposite the inlet opening 2.
  • the fastening element 6 is formed as a disc and connected via support elements 7 with the channels.
  • a third embodiment of an inventive inlet device 1 is shown.
  • the inlet device in contrast to the inlet device 1 according to Figure 3 a mixing chamber 5.
  • the mixing chamber 5 is arranged between the inlet opening 2 and the first, second, third and fourth outlet openings 301, 302, 303, 304.
  • the first, second, third and fourth channels 401, 402, 403, 404 extend continuously from the respective outlet opening 301, 302, 303, 304 to the mixing chamber 5. In this embodiment, therefore, the starting material is collected in the mixing chamber before it in the first, second, third and fourth channel 401, 402, 403, 404 is passed.
  • Fig. 5 shows a fourth embodiment of an inventive inlet device 1.
  • the inlet device 1 has a stabilizing element 8 which completely surrounds the first, second, third and fourth channels 401, 402, 403, 404.
  • the first, second, third and fourth outlet openings 301, 302, 303, 304 are integrated in the stabilizing element 8.
  • the stabilizing element 8 simultaneously serves as a fastening element for mounting the inlet device 1 in the conveying element.
  • Fig. 6 shows a fifth embodiment of an inventive inlet device 1.
  • the stabilizing element 8 is not solid but formed like a grid.
  • the stabilizing element 8 extends only over part of the length of the inlet device. 1
  • Fig. 7 shows a sixth embodiment of an inventive inlet device 1.
  • the inlet device 1 additionally has a fastening element 6, which is designed as a disk and is arranged in the region of the inlet opening 2.

Landscapes

  • Centrifugal Separators (AREA)
EP16198937.1A 2016-11-15 2016-11-15 Dispositif d'insertion pour une centrifugeuse décanteuse Active EP3320976B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16198937.1A EP3320976B1 (fr) 2016-11-15 2016-11-15 Dispositif d'insertion pour une centrifugeuse décanteuse
JP2017210004A JP7061863B2 (ja) 2016-11-15 2017-10-31 デカンタ遠心分離機用の流入装置
US15/799,300 US20180133723A1 (en) 2016-11-15 2017-10-31 Inflow apparatus for a decanter centrifuge
CN201711091574.4A CN108067357B (zh) 2016-11-15 2017-11-08 用于沉降式离心机的流入设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16198937.1A EP3320976B1 (fr) 2016-11-15 2016-11-15 Dispositif d'insertion pour une centrifugeuse décanteuse

Publications (2)

Publication Number Publication Date
EP3320976A1 true EP3320976A1 (fr) 2018-05-16
EP3320976B1 EP3320976B1 (fr) 2020-12-30

Family

ID=57326256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16198937.1A Active EP3320976B1 (fr) 2016-11-15 2016-11-15 Dispositif d'insertion pour une centrifugeuse décanteuse

Country Status (4)

Country Link
US (1) US20180133723A1 (fr)
EP (1) EP3320976B1 (fr)
JP (1) JP7061863B2 (fr)
CN (1) CN108067357B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4059610A1 (fr) * 2021-03-17 2022-09-21 GEA Westfalia Separator Group GmbH Centrifugeuse à vis sans fin et à bol plein

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2515452A1 (de) * 1975-04-09 1976-10-21 Mono Pumps Ltd Abscheidezentrifuge
US4142669A (en) * 1968-01-10 1979-03-06 Robatel S.L.P.I. Continuously operating centrifugal separators
DE102012004544A1 (de) * 2012-03-10 2013-09-12 Flottweg Se Trommelzentrifuge mit einer Einlauf-Beschleunigungseinrichtung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51118158A (en) * 1975-04-09 1976-10-16 Mono Panpusu Eng Ltd Centrifugal separator
US4298160A (en) * 1977-05-24 1981-11-03 Thomas Broadbent & Sons Limited Solid bowl decanter centrifuges
GB1602601A (en) * 1977-05-24 1981-11-11 Broadbent & Sons Ltd Thomas Solid bowl decanter centrifuges
CN1033008C (zh) * 1991-08-21 1996-10-16 寿技王株式会社 沉降式离心机
CN2710755Y (zh) * 2004-06-26 2005-07-20 昆明钢铁股份有限公司 竖式离心分离器
DE102006006178A1 (de) * 2006-02-10 2007-08-16 Westfalia Separator Ag Vollmantel-Schneckenzentrifuge und Verfahren zu deren Betrieb
DK200801848A (en) * 2008-12-30 2010-07-01 Alfa Laval Corp Ab A decanter centrifuge and a decanter centrifuge discharge port memeber.
CN201841055U (zh) * 2010-10-18 2011-05-25 江苏省勤奋药业有限公司 一种用于医药原料制备的沉降式离心机
CN202876959U (zh) * 2012-09-24 2013-04-17 宜城市共同药业有限公司 新型高效沉降离心机
US20180008990A1 (en) * 2016-07-07 2018-01-11 Tobi D. Mengle Centrifugal mechanical separator produced by additive manufacturing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142669A (en) * 1968-01-10 1979-03-06 Robatel S.L.P.I. Continuously operating centrifugal separators
DE2515452A1 (de) * 1975-04-09 1976-10-21 Mono Pumps Ltd Abscheidezentrifuge
DE102012004544A1 (de) * 2012-03-10 2013-09-12 Flottweg Se Trommelzentrifuge mit einer Einlauf-Beschleunigungseinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4059610A1 (fr) * 2021-03-17 2022-09-21 GEA Westfalia Separator Group GmbH Centrifugeuse à vis sans fin et à bol plein

Also Published As

Publication number Publication date
CN108067357A (zh) 2018-05-25
US20180133723A1 (en) 2018-05-17
CN108067357B (zh) 2022-05-17
JP7061863B2 (ja) 2022-05-02
JP2018079464A (ja) 2018-05-24
EP3320976B1 (fr) 2020-12-30

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