EP3833486A1 - Vollmantel-schneckenzentrifuge - Google Patents
Vollmantel-schneckenzentrifugeInfo
- Publication number
- EP3833486A1 EP3833486A1 EP19749629.2A EP19749629A EP3833486A1 EP 3833486 A1 EP3833486 A1 EP 3833486A1 EP 19749629 A EP19749629 A EP 19749629A EP 3833486 A1 EP3833486 A1 EP 3833486A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- bearings
- solid bowl
- screw centrifuge
- bowl screw
- 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
- 239000007787 solid Substances 0.000 title claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000011343 solid material Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/12—Suspending rotary bowls ; Bearings; Packings for bearings
-
- 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
-
- 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
- B04B2001/2091—Configuration of solids outlets
Definitions
- the invention relates to a solid bowl screw centrifuge according to the preamble of claim 1.
- DE 22 57 513 A shows a drum of a tubular centrifuge with a cylindrical drum jacket, which is only conically shaped in sections on the inside.
- the object of the invention is to solve this problem.
- a solid-bowl screw centrifuge with a housing and a rotor rotatably mounted in the housing which has at least the following: a rotatable drum with an axis of rotation, the drum having a cylindrical section with a length Li and a conical section with a length L.
- the inside and outside of the drum (based on the drum jacket) is conical.
- the drum diameter becomes smaller on the outside and inside with increasing distance from the cylindrical section, so that the conical shape results.
- the axis of rotation can be aligned horizontally. But it can also be oriented in a different direction, so vertically.
- This type of construction has the advantage that the solid-bowl screw centrifuge can be operated at an advantageously high speed, since a speed-limiting first resonance frequency of the drum is achieved by the inventive arrangement of the drum bearings with reduced axial distance before at a higher speed than with a larger axial spacing of the bearings.
- a solid-bowl screw centrifuge designed in this way can therefore be operated at a high / higher speed and therefore achieves an advantageously higher separation performance in comparison with a solid-bowl screw centrifuge of the same volume with a conventional arrangement of the drum bearings.
- Bearings which are axially directly adjacent to one another are functionally regarded as a single bearing in the context of this application.
- drum bearings are arranged according to the claims between the drum and the housing or a part firmly connected to the housing, as a radial connection allowing relative rotation between the elements "drum” and “frame” or “housing".
- either one or both drum bearings and / or at least one or possibly both screw bearings are arranged within an axial area which lies between the solids discharge and the liquid drain of the drum.
- the solid bowl screw centrifuge can be operated at an advantageously high speed, since the first resonance frequency of the drum, which generally limits the speed, is only set at a relatively high speed by the advantageous arrangement of the drum bearings according to the invention.
- sections can be designed on the drum shaft sections, which are designed as shaft shoulders and are designed as a bearing seat, possibly. even be dispensed with. This may result in also a simplified manufacture of a drum hub and thus the drum.
- An advantageous increase in performance of the solid-bowl screw centrifuge can then also be achieved in that the drum of the solid-bowl screw centrifuge with a predetermined arrangement of this type is axially extended with a defined spacing of the bearings and defined radius of the drum, so that a solid-bowl screw centrifuge with a larger one Volume results than would have been possible according to the prior art. g-numbers from 5000g - 7000g are easily accessible. The ratio of the length of the drum to the maximum inner diameter of the drum can be increased (also referred to as "A").
- one of the drum bearings can be positioned radially on the outside of the drum or on the drum cover.
- one of the drum bearings is positioned radially on the outside on the conical section of the drum. It can also be provided after further training or alternative training that one of the drum bearings is positioned radially outside on the cylindrical portion of the drum.
- drum bearing positioned radially on the outside of the conical section of the drum has a smaller inner diameter than the cylindrical section of the drum, which reduces the bearing stress and the costs for the bearing and its maintenance or replacement ,
- one of the drum bearings is positioned axially on the outside directly on the drum cover. All of these are before geous positions, in which each or in combination with each other, the inven tion of claims 1 and / or 2 can be advantageously implemented.
- the drum bearings can be designed in different ways.
- the drum bearings are designed as magnetic bearings. This advantageously creates a self-centering drum bearing, which is also particularly suitable for an arrangement on a relatively large radius on the conical or cylindrical part.
- FIG. 4 is a side view of a fourth schematically shown full jacket
- the rotor 200 has a rotatable drum 210 with a horizontal axis of rotation D.
- the axis of rotation D can also be oriented differently, in particular vertically, in space.
- the rotor 200 also includes a worm 230 arranged in the drum 210, the axis of rotation of which coincides with that of the drum 210.
- the worm 230 can be rotated in operation at a differential speed to the drum 210.
- the drum 210 has a cylindrical section 211 with a length Li and an axially adjoining conical section 212 with a length L 2 .
- the cylindrical section 21 1 is closed off from a substantially radially extending drum cover 213.
- the inside and outside of the drum (based on the drum jacket) is conical.
- the worm 230 here also has a cylindrical section 231 and an axially adjoining conical section 232. It is arranged inside the drum 210.
- An inlet pipe 214 which runs here concentrically to the axis of rotation, projects into the drum 210 and opens into a distributor 215 through which a suspension to be processed can be guided radially into a centrifugal space 216 of the drum 210.
- the inlet pipe 214 can either be guided into the drum 210 from the side of the cylindrical drum section 211 or it can be guided into the drum 210 from the side of the conical drum section 212.
- One or more liquid drains 217 can be formed in or on the drum cover 213. These can be designed in various ways, such as openings in the drum cover 213, which have a type of overflow weir, or in another way, such as a peeling disk. At least one solid discharge 218 is formed at the end of the conical section 212.
- the drum 210 is designed as a solid jacket drum. At least one liquid phase F1 of solids Fe is then clarified in the rotating drum 210. The at least one liquid phase emerges from the liquid outlet 217 on the drum cover 213. The solids, on the other hand, are transported by the screw 230 in the direction of the solids discharge 218 and ejected from the drum 210 there.
- FIG. 4 shows a solid bowl screw centrifuge in which a first drum shaft section 220 axially adjoins the drum cover 213 or the actual drum 210, which is connected to the drum 210 in a rotationally fixed manner and a second is connected axially to the conical drum section 212 Drum shaft section 219 closes, which is also rotatably connected to the drum 210.
- the cylindrical section 231 of the worm 230 is axially adjoined by a first worm shaft section 234, which is non-rotatably connected to the worm 230, and the conical drum section 232 is axially adjoined by a second worm shaft section 233, which is also non-rotatably connected to the worm 230 ,
- a drive device with one or two motors (not shown here) is used to drive the rotor 200.
- the drive device 300 is followed by at least one transmission 310, on which here two pulleys 320, 330 are schematically shown, which indicates that the transmission 310 has at least two interfaces for feeding a respective torque of the motor or motors into the transmission 310 in order to To drive the drum and the screw.
- the rotor can also be driven by fly hydraulic motors, so that no gear is required.
- the drive can also be carried out by a combination of electric motor (s) and fly hydraulic motor (s), other gears being used for this purpose and the belt pulleys being omitted in whole or in part.
- Gear 300 rotates drum 210 on the one hand and worm 230 on the other.
- gear 300 has two output shafts.
- the first output shaft is non-rotatably coupled to the first drum shaft section 220 or directly coupled to the drum 210 and the second output shaft is directly or indirectly non-rotatably coupled to the first worm shaft section 234 or directly to the worm 230.
- the drum and the shaft are each rotatably supported by two drum bearings 221, 222 arranged axially in the direction of the axis of rotation.
- the term "camp" is therefore not too narrow.
- Each of the bearings 221, 222 can each consist of one or more individual bearings, which, however, are then arranged axially next to one another in such a way that they can each be functionally considered as a single bearing.
- the bearings 221, 222 can also be designed as bearings of various designs, such as roller bearings - in particular as ceramic bearings, as hybrid ceramic bearings, as magnetic bearings or as plain bearings.
- the drum bearings 221, 222 are arranged between the drum 210 and the frame 100 or a part connected to the frame so that the drum 210 can be rotated relative to the frame 100. This also applies to all variants described below and falling under the claims.
- the drum bearings 221, 222 are preferably arranged radially between the drum 210 and the frame 100 or a part connected to the frame.
- the screw bearings 235, 236, are arranged radially between the screw 230 and the drum 210, so that the screw 230 can be rotated relative to the drum 210.
- the worm bearings 235, 236 are preferably arranged radially between the drum 210 and the worm 230.
- one of the screw bearings 235 in the area of the solids discharge 218 can be omitted.
- the rotating screw centers itself which e.g. with a vertical arrangement of the decanter is known.
- the drum bearings 221, 222 are arranged axially outside the axial region L T of the drum 210, which lies between the solids discharge 218 and the liquid discharge 217 of the drum 210. They are in FIG. 4, for example, between the solids discharge 218 and an adjacent axial end of the housing 100 and the liquid outlet 217 and an adjacent axial end of the housing. Accordingly, a distance L L of the drum bearings 221, 222 is greater than a length L T the drum 210, which is added from the length Li of the cylindrical section 21 1 of the drum 210 and the length L 2 of the conical section 212 of the drum 210.
- the ratio between the diameter of the drum on which the solids discharge is arranged and the maximum inside diameter of the drum can be between 0.4 and 0.3. This can advantageously help to keep the energy loss caused by the solids discharge low or to reduce it.
- a relatively large value “A” can also be achieved (see the definition above).
- the respective distance Ai and / or A 2 between the respective end of the drum 210 and the respective position of the drum bearing 221 and / or 222.
- the respective distance Ai and / or A 2 by which the respective drum bearing 221, 222 is spaced from the liquid outlet 217 or the solids discharge 218 in the axial direction, so that it is positioned between the liquid outlet 217 and the solids discharge 218, is preferably 0 to 35% and particularly preferably 0 to 25% of the length of the drum 210 L T.
Landscapes
- Centrifugal Separators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018119279.7A DE102018119279A1 (de) | 2018-08-08 | 2018-08-08 | Vollmantel-Schneckenzentrifuge |
PCT/EP2019/070072 WO2020030438A1 (de) | 2018-08-08 | 2019-07-25 | Vollmantel-schneckenzentrifuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3833486A1 true EP3833486A1 (de) | 2021-06-16 |
EP3833486B1 EP3833486B1 (de) | 2024-07-03 |
Family
ID=67544183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19749629.2A Active EP3833486B1 (de) | 2018-08-08 | 2019-07-25 | Vollmantel-schneckenzentrifuge |
Country Status (5)
Country | Link |
---|---|
US (1) | US12023688B2 (de) |
EP (1) | EP3833486B1 (de) |
JP (2) | JP2021531959A (de) |
DE (1) | DE102018119279A1 (de) |
WO (1) | WO2020030438A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019126325A1 (de) | 2019-09-30 | 2021-04-01 | Gea Mechanical Equipment Gmbh | Vollmantel-Schneckenzentrifuge |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB539140A (en) | 1940-09-27 | 1941-08-28 | Alfred Reinhold Jahn | Improvements in or relating to centrifugal separators |
US3389881A (en) | 1965-07-17 | 1968-06-25 | Philips Corp | Resilient supports for rotating machine parts |
DE2257513A1 (de) * | 1972-11-23 | 1974-05-30 | Rudolf Friedrich | Rohrzentrifuge |
DD119628A1 (de) | 1975-02-25 | 1976-05-05 | ||
DD153614A1 (de) | 1980-10-15 | 1982-01-20 | Erich Barth | Trommellagerung,insbesondere fuer trommelwaschmaschinen und zentrifugen |
DE3142779C2 (de) * | 1981-10-28 | 1986-03-20 | Werner Prof. Dr. 6740 Landau Stahl | Vollmantel-Schnecken-Zentrifuge |
DE3219686A1 (de) * | 1982-05-26 | 1983-12-15 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Lagereinheit fuer die foerderschnecke einer zentrifuge |
DK151186C (da) | 1982-10-21 | 1988-04-25 | Alfa Laval Separation As | Dekantercentrifuge |
EP0341433B1 (de) * | 1988-05-11 | 1993-08-04 | Flottweg Gmbh | Vollmantel-Schnecken-Zentrifuge |
SE9802116D0 (sv) * | 1998-06-15 | 1998-06-15 | Alfa Laval Ab | Dekantercentrifug |
WO2007086114A1 (ja) * | 2006-01-25 | 2007-08-02 | Tomoe Engineering Co., Ltd. | 竪型遠心分離機 |
RU2456084C2 (ru) | 2006-09-11 | 2012-07-20 | Геа Вестфалия Сепаратор Гмбх | Центрифуга с ротором с горизонтальной осью вращения |
DE102014108236A1 (de) * | 2014-06-12 | 2015-12-17 | Gea Mechanical Equipment Gmbh | Vollmantel-Schneckenzentrifuge und Verfahren zu deren Betrieb |
-
2018
- 2018-08-08 DE DE102018119279.7A patent/DE102018119279A1/de active Pending
-
2019
- 2019-07-25 JP JP2021501006A patent/JP2021531959A/ja active Pending
- 2019-07-25 US US17/266,334 patent/US12023688B2/en active Active
- 2019-07-25 EP EP19749629.2A patent/EP3833486B1/de active Active
- 2019-07-25 WO PCT/EP2019/070072 patent/WO2020030438A1/de unknown
-
2024
- 2024-02-06 JP JP2024016246A patent/JP2024054216A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102018119279A1 (de) | 2020-02-13 |
JP2021531959A (ja) | 2021-11-25 |
US20210308696A1 (en) | 2021-10-07 |
WO2020030438A1 (de) | 2020-02-13 |
JP2024054216A (ja) | 2024-04-16 |
US12023688B2 (en) | 2024-07-02 |
EP3833486B1 (de) | 2024-07-03 |
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