EP1480754A1 - Dreiphasen-vollmantel-schneckenzentrifuge, vollmantel-schneckenzentrifuge und verfahren zum betreiben einer dreiphasen-vollmantel-schneckenzentrifuge - Google Patents
Dreiphasen-vollmantel-schneckenzentrifuge, vollmantel-schneckenzentrifuge und verfahren zum betreiben einer dreiphasen-vollmantel-schneckenzentrifugeInfo
- Publication number
- EP1480754A1 EP1480754A1 EP03711925A EP03711925A EP1480754A1 EP 1480754 A1 EP1480754 A1 EP 1480754A1 EP 03711925 A EP03711925 A EP 03711925A EP 03711925 A EP03711925 A EP 03711925A EP 1480754 A1 EP1480754 A1 EP 1480754A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- passage
- throttle
- weir
- drum
- phase
- 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
Links
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
- B04B1/20—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
- 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
- B04B2001/2083—Configuration of liquid outlets
Definitions
- the invention relates to a three-phase full-shell screw centrifuge according to the preamble of claim 1, a solid-bowl screw centrifuge according to the preamble of claim 9 and a method for operating a three-phase solid-bowl screw centrifuge according to the upper handle of claim 12.
- Centrifugal chamber are discharged.
- the heavy liquid phase is broken down via a peeling system, while the water from the further, lighter liquid phase is drained off via a further separation system, in particular a second peeling system.
- the lighter liquid phase can leave the solid-bowl screw centrifuge freely using weir devices.
- a large difference in the relative speed is set between an adjustable peeling disc of the first peeling system and the centrifuge drum.
- the invention has the task of developing the three-phase solid-bowl screw centrifuge in such a way that a precise and low-maintenance manner can be used to precisely set the discharge amount, in particular the heavier liquid phase. Furthermore, an advantageous and simple method for operating this three-phase solid-bowl screw centrifuge is to be created. The invention achieves this aim with regard to the three-phase solid-bowl screw centrifuge by the subject matter of claim 1 and with regard to the method by the subject matter of claim 12.
- the second weir has a passage for discharging the heavy liquid phase, to which a throttle device is assigned, the distance to the passage being variable.
- a first lighter liquid phase is derived via a first, inner weir and a second, heavier liquid phase via a second, outer weir, the distance between a throttle device and a passage of the second being used to change the amount of the heavier liquid phase that runs off Weir is changed.
- the throttle device is preferably designed as a stationary part during operation of the centrifuge, and preferably as a throttle disc that does not rotate with the drum and is radially adjustable relative to the outlet.
- a throttle device of this type is known in principle from DE 43 20 265 AI.
- the solid-bowl screw centrifuge disclosed in this document is provided on the liquid outlet side with a weir which has a passage which can be formed by a plurality of grooves extending from the inside diameter of the weir or by openings provided in the walls of the weir.
- a throttle disc which is stationary relative to this while the drum is rotating and which is axially displaceable via a threaded bushing.
- the distance between the weir and the throttle plate can be changed by turning the threaded bushing. This changes the discharge cross-section for the liquid running out of the centrifugal drum, which affects the liquid level in the centrifuge.
- the throttle device can be used to simply adjust the discharge amount of the second liquid phase in a three-phase centrifuge. It is conceivable, however, to also design the inner weir, for example in the manner of this document, ie to make the distance of a throttle device to a passage of the second weir variable. With the invention it is therefore possible to regulate the outlet quantity of the heavy liquid phase in a particularly simple manner by adjusting the throttle device, for example depending on the decanter inlet quantity and / or on the torque of the screw and / or on the differential speed between the screw and drum and / or from the motor current. This regulation is carried out in particular automatically and preferably using a control computer assigned to the centrifuge.
- the three-phase technology aims to separate the ingredients of the heavy liquid phase (e.g. glue, fine starch) from the ingredients of the light phase (e.g. mucilages, pentosans). Since no satisfactory automatic control of the heavier liquid phase was previously possible, too many ingredients in one (e.g. the light) liquid phase were transferred to the other (e.g. heavier liquid phase) when the product was changed during operation. This is avoided with the invention.
- the ingredients of the heavy liquid phase e.g. glue, fine starch
- the ingredients of the light phase e.g. mucilages, pentosans
- DE 100 21 983 AI proposes, in the case of a pivotable, non-nitriding throttle disk for a two-phase centrifuge, which is based on the principle of the throttle disk of DE 43 20 265 AI, to provide the throttle disk with an annular groove, which is referred to as a "ring cup" ,
- the throttle device is also conceivable for the throttle device to be designed as a throttle device, in particular throttle disk, which rotates with the drum and whose distance from the passage is adjustable.
- a throttle device in particular throttle disk, which rotates with the drum and whose distance from the passage is adjustable.
- Fig. 5 it is known to assign a co-rotating, inflatable dam to the inner weir in a three-phase centrifuge with two liquid phases to be discharged.
- An inflatable or inflatable dam is also known for this purpose from DE 199 62 645 AI.
- the invention also provides, according to a further idea, which is also to be considered independently, a solid-bowl screw centrifuge with at least one weir for discharging a liquid phase from the centrifugal drum, the at least one weir having a passage to which a throttle device is assigned, the distance or position of which is relative is variable to the passage, the throttle device having a throttle ring which is movable, in particular displaceably, over a radially outwardly directed passage opening of the passage such that the outlet cross section at the passage opening is variable by adjusting the position of the throttle ring relative to the passage opening.
- This arrangement with the displaceable throttle ring (in particular also a cylindrical, sleeve-like part) above the one or more essentially radially outwardly directed passage opening (s) is suitable both for deriving the heavier phase from a three-phase centrifuge and for regulating the Liquid level in a two-phase centrifuge with only a single weir.
- the throttle ring is used to implement a particularly compact design of a throttle device, which is short in the direction of the longitudinal axis of the drum.
- the throttle ring is advantageously designed as a stationary part in operation relative to the rotating drum.
- This embodiment is structurally particularly simple.
- the throttle ring is designed as a part which rotates with the drum during operation.
- the amount of discharge of the heavy liquid phase is preferably regulated automatically.
- Figure 1 shows a solid bowl screw centrifuge according to the invention
- Figure 2 shows the area of the weir of the solid bowl screw centrifuge from Figure i;
- FIG. 3 shows the area of the weir of a second full jacket according to the invention.
- Figure 4 shows the area of the weir of a third solid jacket screw centrifuge
- Figure 1 shows a three-phase solid bowl screw centrifuge 1 with a drum 3, in which a screw 5 is arranged.
- the drum 3 and the screw 5 each have an essentially cylindrical section and a section which tapers conically here.
- An axially extending central inlet pipe 7 serves to feed the centrifugal material via a distributor 9 into the centrifugal chamber 11 between the screw 5 and the drum 3.
- the first inner i.e. weir 15 closer to the axis of rotation than the second weir 17 has a passage 19 in an axial cover 21 of the drum 3, which is followed by a peeling disk 23 in the outflow direction.
- the peeling disk 23 is arranged in an inner annular space 25 of an annular piece 27 with a cylindrical projection 29, the liquid being drained through the peeling disk 23 in a channel 33 between the inner circumference of a likewise cylindrical projection 31 of the peeling disk 23 and the outer circumference of the inlet pipe 7 ,
- the inner edge of the passage 19 is offset radially further inwards in the radial direction of the cover 21 relative to the inner periphery of the centrifugal chamber or relative to the outer periphery of the screw body.
- the first liquid phase is advantageously drained off under pressure through the peeling disk 23.
- the liquid level can also be adjusted within certain limits (throttling).
- a control method for decanters is described in EP 0 868 215 B1.
- the use of peeling disc-like discharge elements (peeling head) in decanters is known in principle from DE 33 44 432, but not in the combination of features selected here with adjustable outer weirs.
- the discharge of the second liquid phase L2 takes place through the further weir 17, which has an adjustable throttle device 35, which is arranged downstream of a passage 37, which is arranged further outward in the cover 21 in the radial direction and axially penetrates both the cover 21 and the ring piece 27 ,
- the adjustable throttle device 35 has a throttle disc 39, the distance to the passage 29 is variable, for example in the manner described in DE 43 20 265 AI, with a wide variety of drive devices.
- the throttle plate 39 is attached to one end of at least one bolt 41, which is guided here, for example, axially displaceably by means of a motor 43 (also conceivable by hand), so that the distance between the throttle plate 39 which is stationary during operation and the at least one (or more) passage 37 by axial movement, in particular by an axial displacement (can also be realized by pivoting) of the throttle plate 39 relative to the drum 3 rotating during operation.
- a motor 43 also conceivable by hand
- the throttle device is surprisingly not used to adjust the liquid level in the drum, but primarily to adjust the flow rate of the second liquid phase L2.
- the exemplary embodiment in FIG. 3 largely corresponds to that in FIGS. 1 and 2, but the first weir 15 is not assigned a peeling disc, but is designed as a simple adjustable overflow weir and has only the one that is adjustable (in cross-section, for example, through a flap) and cannot be seen here) Passage 19 in the lid 21, from which the first liquid phase L1 runs freely - and not under pressure - so that a pump for discharging the first liquid phase L1 may have to be provided.
- the embodiment of Figure 4 differs from that of Figure 3 in that the throttle plate 51 is axially adjustable, but rotates with the drum.
- the drive (not shown) for the axial adjustment of the throttle slide 51 relative to its holder 45 must rotate with the drum 3, which clearly shows the structural complexity and, in particular, the maintenance required compared to the exemplary embodiment in FIG. 2 increases, but the possibility of regulating the heavy liquid phase remains obese.
- a spring and / or hydraulic system can be used to axially move the throttle disk 51.
- the passage 37 (with any cross section) is guided axially outwards in the ring piece 27, a throttle ring 47 being preferred instead of a throttle disk is provided, which is guided axially displaceably over the radially outward opening 49 (again by means of an arrangement of axially adjustable bolt 41 and motor 43).
- a throttle ring 47 which does not have to be cylindrical but can have a different shape, for example, also with a chamfered or chamfered inner circumference - the cross-section of the passage opening 49 is more or less released relative to the passage opening 49 and the flow rate of the second liquid phase L2 is changed ,
Landscapes
- Centrifugal Separators (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10209925 | 2002-03-07 | ||
DE10209925A DE10209925B4 (de) | 2002-03-07 | 2002-03-07 | Dreiphasen-Vollmantel-Schneckenzentrifuge, Vollmantel-Schneckenzentrifuge und Verfahren zum Betreiben einer Dreiphasen-Vollmantel-Schneckenzentrifuge |
PCT/EP2003/002237 WO2003074185A1 (de) | 2002-03-07 | 2003-03-05 | Dreiphasen-vollmantel-schneckenzentrifuge, vollmantel-schneckenzentrifuge und verfahren zum betreiben einer dreiphasen-vollmantel-schneckenzentrifuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1480754A1 true EP1480754A1 (de) | 2004-12-01 |
EP1480754B1 EP1480754B1 (de) | 2010-04-28 |
Family
ID=27771050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03711925A Expired - Lifetime EP1480754B1 (de) | 2002-03-07 | 2003-03-05 | Dreiphasen-vollmantel-schneckenzentrifuge, vollmantel-schneckenzentrifuge und verfahren zum betreiben einer dreiphasen-vollmantel-schneckenzentrifuge |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1480754B1 (de) |
AT (1) | ATE465814T1 (de) |
AU (1) | AU2003218690A1 (de) |
DE (2) | DE10209925B4 (de) |
DK (1) | DK1480754T3 (de) |
ES (1) | ES2344409T3 (de) |
WO (1) | WO2003074185A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8157716B2 (en) | 2008-04-16 | 2012-04-17 | Alfa Laval Corporate Ab | Centrifugal separator for recovery of kinetic energy from a discharged liquid |
WO2012062336A2 (en) | 2010-11-12 | 2012-05-18 | Alfa Laval Corporate Ab | A centrifugal separator |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10203652B4 (de) * | 2002-01-30 | 2006-10-19 | Westfalia Separator Ag | Vollmantel-Schneckenzentrifuge mit einem Wehr |
DE10336350B4 (de) | 2003-08-08 | 2007-10-31 | Westfalia Separator Ag | Vollmantel-Schneckenzentrifuge, mit Schälscheibe |
US7255670B2 (en) * | 2004-03-04 | 2007-08-14 | Hutchison Hayes, L.P. | Three phase decanter centrifuge |
DE102005027553A1 (de) * | 2005-06-14 | 2006-12-28 | Westfalia Separator Ag | Drei-Phasen-Vollmantel-Schneckenzentrifuge und Verfahren zur Regelung des Trennprozesses |
DE102006030477A1 (de) | 2006-03-30 | 2007-10-04 | Westfalia Separator Ag | Vollmantel-Schneckenzentrifuge mit Abflußöffnungen zur Teil- und Restentleerung der Trommel |
EP2015871B1 (de) | 2006-05-11 | 2017-04-26 | GEA Mechanical Equipment GmbH | Drei-phasen-trennseparator mit einer schälscheibe und feststoffaustragsöffnungen |
US8579783B2 (en) * | 2009-07-02 | 2013-11-12 | Andritz S.A.S. | Weir and choke plate for solid bowl centrifuge |
DK178253B1 (en) | 2010-11-12 | 2015-10-12 | Alfa Laval Corp Ab | A centrifugal separator and an outlet element for a centrifugal separator |
CN103316782A (zh) * | 2013-07-05 | 2013-09-25 | 安徽赛而特离心机有限公司 | 一种三相碟式分离机转鼓组 |
GB201321250D0 (en) | 2013-12-02 | 2014-01-15 | Gm Innovations Ltd | An apparatus for removing impurities from a fluid stream |
GB201703110D0 (en) * | 2017-02-27 | 2017-04-12 | Gm Innovations Ltd | An apparatus for seperating components of a fluid stream |
GB2572331B (en) | 2018-03-26 | 2022-03-09 | Gm Innovations Ltd | An apparatus for separating components of a fluid stream |
GB2606484A (en) | 2018-04-24 | 2022-11-09 | Gm Innovations Ltd | An apparatus for producing potable water |
DE102022100511A1 (de) | 2022-01-11 | 2023-07-13 | Gea Westfalia Separator Group Gmbh | Vollmantel-Schneckenzentrifuge und Verfahren zur Regelung des Trennprozesses der Vollmantel-Schneckenzentrifuge |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3344432A1 (de) * | 1983-12-08 | 1985-06-20 | Flottweg Bird Mach Gmbh | Zentrifuge zur trennung einer suspension mit zwei getrennt abzufuehrenden fluessigkeitsphasen |
US5257968A (en) * | 1991-06-06 | 1993-11-02 | Alfa Laval Separation Inc. | Inflatable dam for a decanter centrifuge |
DE4130759A1 (de) * | 1991-09-16 | 1993-03-18 | Flottweg Gmbh | Zentrifuge zur kontinuierlichen trennung von stoffen unterschiedlicher dichte |
DE4320265C2 (de) * | 1993-06-18 | 1995-08-03 | Westfalia Separator Ag | Wehr für Vollmantelschleudertrommeln |
US5948271A (en) * | 1995-12-01 | 1999-09-07 | Baker Hughes Incorporated | Method and apparatus for controlling and monitoring continuous feed centrifuge |
DE19962645C2 (de) * | 1999-12-23 | 2003-04-30 | Flottweg Gmbh | Wehreinrichtung für eine Zentrifuge |
DE10021983A1 (de) * | 2000-05-05 | 2001-11-08 | Baker Hughes De Gmbh | Vollmantelzentrifuge zur Trennung von Feststoff-Flüssigkeitsgemischen |
-
2002
- 2002-03-07 DE DE10209925A patent/DE10209925B4/de not_active Expired - Fee Related
-
2003
- 2003-03-05 EP EP03711925A patent/EP1480754B1/de not_active Expired - Lifetime
- 2003-03-05 AU AU2003218690A patent/AU2003218690A1/en not_active Abandoned
- 2003-03-05 DE DE50312663T patent/DE50312663D1/de not_active Expired - Lifetime
- 2003-03-05 AT AT03711925T patent/ATE465814T1/de active
- 2003-03-05 WO PCT/EP2003/002237 patent/WO2003074185A1/de not_active Application Discontinuation
- 2003-03-05 DK DK03711925.2T patent/DK1480754T3/da active
- 2003-03-05 ES ES03711925T patent/ES2344409T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03074185A1 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8157716B2 (en) | 2008-04-16 | 2012-04-17 | Alfa Laval Corporate Ab | Centrifugal separator for recovery of kinetic energy from a discharged liquid |
WO2012062336A2 (en) | 2010-11-12 | 2012-05-18 | Alfa Laval Corporate Ab | A centrifugal separator |
WO2012062336A3 (en) * | 2010-11-12 | 2012-09-07 | Alfa Laval Corporate Ab | A centrifugal separator |
RU2536146C1 (ru) * | 2010-11-12 | 2014-12-20 | Альфа Лаваль Корпорейт Аб | Центробежный сепаратор |
AU2011328615B2 (en) * | 2010-11-12 | 2015-04-16 | Alfa Laval Corporate Ab | A centrifugal separator |
US9352338B2 (en) | 2010-11-12 | 2016-05-31 | Alfa Laval Corporate Ab | Centrifugal separator with a casing sealing arrangement |
Also Published As
Publication number | Publication date |
---|---|
AU2003218690A1 (en) | 2003-09-16 |
DK1480754T3 (da) | 2010-08-16 |
WO2003074185A1 (de) | 2003-09-12 |
DE10209925B4 (de) | 2010-06-17 |
DE50312663D1 (de) | 2010-06-10 |
DE10209925A1 (de) | 2003-09-25 |
EP1480754B1 (de) | 2010-04-28 |
ATE465814T1 (de) | 2010-05-15 |
ES2344409T3 (es) | 2010-08-26 |
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