EP0068095B1 - Centrifugeuse à poussoir - Google Patents

Centrifugeuse à poussoir Download PDF

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Publication number
EP0068095B1
EP0068095B1 EP82103444A EP82103444A EP0068095B1 EP 0068095 B1 EP0068095 B1 EP 0068095B1 EP 82103444 A EP82103444 A EP 82103444A EP 82103444 A EP82103444 A EP 82103444A EP 0068095 B1 EP0068095 B1 EP 0068095B1
Authority
EP
European Patent Office
Prior art keywords
floor member
sieve drum
pusher
sieve
pusher floor
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.)
Expired
Application number
EP82103444A
Other languages
German (de)
English (en)
Other versions
EP0068095A3 (en
EP0068095A2 (fr
Inventor
Bruno Mülhaupt
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.)
Sulzer Escher Wyss AG
Original Assignee
Sulzer Escher Wyss 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 Sulzer Escher Wyss AG filed Critical Sulzer Escher Wyss AG
Publication of EP0068095A2 publication Critical patent/EP0068095A2/fr
Publication of EP0068095A3 publication Critical patent/EP0068095A3/de
Application granted granted Critical
Publication of EP0068095B1 publication Critical patent/EP0068095B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges

Definitions

  • the application relates to a pusher centrifuge with at least one sieve drum rotatably mounted in a housing and with a disk-shaped sliding floor arranged coaxially in the sieve drum, which is rotatable and can be moved back and forth in the longitudinal direction between turning points relative to the sieve drum, and for coating one Longitudinal section of the filter surface of the sieve drum and for pushing a filter cake along the sieve drum in the direction towards discharge openings for the filter cake is provided, the turning points preferably being on both sides of the imaginary center line of the sieve drum, with a coaxially arranged to feed the suspension to be separated in the sieve drum
  • the feed tube is provided, and the discharge openings for the filter cake are provided on both sides of the sieve drum.
  • Such push centrifuges are known for example from DE-AS 1 065333 and from DE-AS 1 114149.
  • the general advantages of the pusher centrifuge are associated with the disadvantage that the centrifuge can only be fed with relatively high solids concentrations. If the inlet concentration decreases, there is a risk of washing up.
  • Flooding is the operating state when the drainage time between two strokes of the moving floor is not sufficient to drain the swamp in front of the moving floor to such an extent that the cake can be transported.
  • the sump is the longitudinal section of the screening drum that is swept by the moving floor. If the drainage is not sufficient, there is still a suspension in the swamp when the moving floor returns, which cannot be moved as a cake, which leads to the above-mentioned flooding.
  • centrifuges have a separate feed line for each side with respect to the moving floor, one of which opens on one side and the second on the other side of the moving floor, so that the sump area on both sides of the moving floor is under constant supply of the suspension and can come to water.
  • the invention has for its object to provide a pusher centrifuge of the type specified, with which thin suspensions can be processed.
  • the outflow opening of the feed pipe points radially outwards, lies in the middle between the two turning points of the push floor, and in that the push floor has a central opening which clears a passage for the feed pipe through the push floor, so that the outflow opening of the feed pipe is alternately located on one or the other side of the moving floor when the pushing floor is pushed back and forth relative to the outflow opening.
  • the push centrifuge is provided with a washing device for washing the filter cake on the sieve surface of the sieve drum.
  • the push centrifuge as a two-stage centrifuge.
  • a screen drum 2 is rotatably mounted in a housing 1 of the pusher centrifuge.
  • a disc-shaped sliding floor 4 is arranged, which is rotatable and can be moved back and forth in the longitudinal direction between two turning points, 5 in FIG. 1 and 6 in FIG. 2, relative to the screening drum 2.
  • the push floor 4 sweeps a longitudinal section between the turning points 5 and 6 of the filter surface of the screening drum 2 and in each case moves a filter cake along the screening drum 2 in the direction of discharge openings 7, which are provided for the filter cake to be let out.
  • the sump which is designated here by 28.
  • the turning points 5 and 6 are preferably on both sides of the imaginary center line 3, in FIG. 1, the sieve drum 2, the push floor 4 thus oscillates in a longitudinal section of the sieve drum about this imaginary center line 3.
  • a Provided feed tube 8 which is arranged coaxially with the sieve drum.
  • An outflow opening 9 of the feed pipe 8 is located in the middle between the two turning points 5 and 6 of the moving floor 4 and points the flow of the suspension radially outwards, ie. H. in the radial direction to the sieve surface of the sieve drum 2.
  • the push floor 4 has a central opening 10 which opens a passage for the feed pipe through the push floor during its back and forth movement relative to the outflow opening.
  • the outflow opening 9 of the feed pipe 8 is alternately on one or the other side of the moving floor 4 when the pushing floor 4 is pushed back and forth relative to the outflow opening.
  • the inflow of the suspension to be separated is introduced into the sump 28, when the sieve bottom 4, after the filter cake has been pushed away, moves to the next turning point and has thus exposed the longitudinal section of the filter surface, so that the liquid of the suspension, unhindered by no filter cake layer, is discharged through the sieve surface of the drum 2.
  • the filter cake is pushed along the screening drum 2 in both longitudinal directions.
  • the feed tube 8 can be provided for directing the current in the radially outward direction with a baffle plate, as z. B. in Figs. 1 and 2 at the end of the tube 8 can be seen. It would also be possible, as shown in FIG. 3, to close the feed pipe 8 with a cover and to arrange openings 9 for the outflow of the suspension to be supplied.
  • the wall delimiting the central opening 10 in the moving floor 4 has a wedge-shaped cross section 11 which points against the direction of the flow direction of the suspension flowing out radially and for distributing the flow of the suspension serves.
  • a friction disc 12 or 13 arranged coaxially and parallel to the moving floor is attached to the moving floor 4 on both sides.
  • the attachment is provided by a few rods 24, which are each arranged between the moving floor and the respective friction disc 12 or 13.
  • the friction disk 13 attached to the side of the sliding floor 4 facing the feed pipe 8 is provided with a central opening 14 provided for the passage of the feed pipe.
  • the structure fastened together consisting of the sliding floor 4 and the friction disks 12 and 13, is supported, rotated and displaced by means of a shaft 25 which is fastened to the friction disk 12.
  • the screen drum 2 is overhung in the housing 1
  • the embodiment according to FIG. 6 shows storage on both sides of the screen drum 2 in the centrifuge housing 1.
  • a push centrifuge according to the invention can be built, in which the sieve drum has a cylindrical part 15 in the middle, which merges on both sides into a conical part 16 that widens in the direction of the discharge openings 7 on both sides of this sieve drum.
  • This screen drum is mounted on both sides in the housing.
  • the push floor 4 is slidably arranged along the cylindrical part 15.
  • the pusher centrifuge as shown in FIGS. 1, 2 and 5, is provided with a washing device 17 and 18 for washing the filter cake on the sieve surface of the sieve drum 2.
  • the washing device 17 has a body 21 which is built into the interior of the screening drum 2 and is fastened to the wall of the screening drum. Lines 22 lead through this body to nozzles 23, through which a washing liquid is thrown out in the direction of the filter cake on the sieve surface of the sieve drum 2.
  • the washing liquid is fed through a line 19 and is passed into a channel 20 on the wall of the screening drum 2, from which the lines 22 lead to the nozzles 23.
  • the body 21 can, as is particularly clearly shown in FIG.
  • FIG. 1 A two-stage centrifuge according to the invention is shown schematically in FIG.
  • Two nested drum 2 1 and 2 2 forming a two-stage centrifuge are provided.
  • the outer drum 2 2 is rotatable by means of a shaft 26 which is attached to its end wall.
  • the structure consisting of the sliding floor 4 and the friction disks 12 and 13 is also fastened to this end wall by means of the rods 29.
  • the push floor 4 is arranged in the middle of the screening drum 2 2 .
  • the screening drum 2 1 is nested in the screening drum 2 2 and can be displaced axially relative to the latter.
  • oscillating displacement tie rods 27 are used, which lead through slots 30 in the screen drum 2 2 and are connected to the screen drum 2 1 .
  • the structure of the moving floor 4 and the friction disks 12 and 13 rotates together with the sieve drum 2 2 and is axially immovable relative to the sieve drum 2 2 .
  • a relative displacement between the sliding floor 4 and the screening drum of the first stage 2 1 is achieved by moving this screening drum by means of the tie rods 27.
  • This longitudinally axial, oscillating displacement of the sieve drum 2 1 on the one hand transports the filter cake on the sieve surface of the sieve drum 2 1 , so that it is pushed onto the sieve surface of the sieve drum of the second stage 2 2 , and at the same time it is also along the sieve surface of the sieve drum the second stage 2 2 in the direction of the discharge openings 7, on both sides of the screening drum 2 2 , and falls there as a product.
  • the relative displacement between the outflow opening 9 of the feed pipe 8 1 and the sliding floor 4, which is arranged here axially immovable, that is to say remaining in its longitudinal axial position, is achieved by longitudinally axially, oscillating displacement of the feed pipe 8 1 .
  • the two displacements: the displacement of the screen drum 2 1 relative to the moving floor 4 and the displacement of the feed pipe 8 1 relative to the moving floor 4 take place in the same cycle.

Landscapes

  • Centrifugal Separators (AREA)

Claims (6)

1. Centrifugeuse à poussoir, comportant au moins un tambour perforé (2), logé tournant dans une enveloppe (1), ainsi qu'une plaque de poussée (4) en forme de disque, placée dans le tambour perforé coaxialement à celui-ci, cette plaque de poussée étant tournante et déplaçable en va-et-vient dans le sens de la longueur par rapport au tambour perforé (2) entre des points d'inversion (5 et 6) et étant prévue pour balayer un tronçon longitudinal de la surface de filtrage du tambour perforé et pour pousser un gâteau de filtrage le long du tambour en direction d'ouvertures d'évacuation (7), cependant que les points d'inversion sont de préférence disposés des deux côtés de la médiane (3) du tambour perforé, cependant que, pour l'alimentation de la suspension à séparer dans le tambour perforé (2), est prévu un tuyau d'alimentation (8, 81), coaxial au tambour, les ouvertures d'évacuation (7) du gâteau de filtrage étant prévues sur les deux côtés du tambour perforé (2), caractérisée en ce que l'ouverture d'écoulement (9) du tuyau d'alimentation (8, 81) est dirigée radialement vers l'extérieur et située au milieu de la droite joignant les deux points d'inversion (5 et 6) de la plaque de poussée (4) et en ce que la plaque de poussée (4) présente une ouverture centrale (10), qui libère un passage pour le tuyau d'alimentation à travers cette plaque, de sorte que l'ouverture d'écoulement (9) du tuyau d'alimentation (8) se trouve d'un côté ou de l'autre de la plaque de poussée (4) pendant le va-et-vient de celle-ci par rapport à l'ouverture d'écoulement (9).
2. Centrifugeuse à poussoir suivant la revendication 1, caractérisée en ce que la paroi qui limite l'ouverture centrale (10) dans la plaque de poussée (4) présente, pour la répartition du courant de la suspension s'écoulant radialement vers l'extérieur, une section transversale (11) en forme de coin, dirigée contre le sens du courant.
3. Centrifugeuse à poussoir suivant la revendication 1, caractérisée en ce que, des deux côtés de la plaque de poussée (4), est chaque fois fixé un disque de frottement (12, 13) coaxial et parallèle à la plaque de poussée, laissant chaque fois, entre la plaque de poussée (4) et le disque de frottement (12, 13), un espace intermédiaire pour le passage de la suspension à séparer en direction de la surface de filtrage du tambour perforé (2), cependant que le disque de frottement (13) placé sur la face de la plaque de poussée tournée vers le tuyau d'alimentation (8) est muni d'une ouverture centrale (14), pour le passage du tuyau d'alimentation.
4. Centrifugeuse à poussoir suivant la revendication 1, caractérisée en ce que le tambour perforé présente une partie cylindrique, (15, fig. 7), qui se transforme, des deux côtés, en une partie conique (16), s'élargissant vers les ouvertures d'évacuation (7), cependant que le tambour perforé est logé des deux côtés dans une enveloppe et en ce que, sur la centrifugeuse, la plaque de poussée (4) est logée mobile le long de la partie cylindrique (15).
5. Centrifugeuse à poussoir suivant la revendication 1, caractérisée en ce qu'elle est munie d'un dispositif (17, 18) pour le lavage du gâteau de filtrage sur la surface de filtrage du tambour perforé (2).
6. Centrifugeuse à poussoir suivant la revendication 1, caractérisée en ce qu'elle comprend deux tambours perforés (21 et 22, sur la fig. 8), insérés l'un dans l'autre et formant une centrifugeuse à deux étages, sur laquelle le tambour perforé du premier étage (21) est mobile axialement par rapport à la plaque de poussée (4) et au tambour perforé du deuxième étage (22), cependant que, par suite de ce mouvement relatif, le gâteau de filtrage peut être déplacé aussi le long du deuxième étage et sur laquelle le tuyau d'alimentation (81) est mobile par rapport à la plaque de poussée (4) restant axialement dans sa position longitudinale.
EP82103444A 1981-06-25 1982-04-23 Centrifugeuse à poussoir Expired EP0068095B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4199/81A CH653573A5 (de) 1981-06-25 1981-06-25 Schubzentrifuge.
CH4199/81 1981-06-25

Publications (3)

Publication Number Publication Date
EP0068095A2 EP0068095A2 (fr) 1983-01-05
EP0068095A3 EP0068095A3 (en) 1984-05-23
EP0068095B1 true EP0068095B1 (fr) 1986-03-05

Family

ID=4271638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103444A Expired EP0068095B1 (fr) 1981-06-25 1982-04-23 Centrifugeuse à poussoir

Country Status (6)

Country Link
US (1) US4434052A (fr)
EP (1) EP0068095B1 (fr)
JP (1) JPS5845760A (fr)
CA (1) CA1169831A (fr)
CH (1) CH653573A5 (fr)
DE (1) DE3269565D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4010748A1 (de) * 1989-04-13 1990-10-25 Stahl Werner Verfahren zum betrieb einer schubzentrifuge
US5305685A (en) * 1993-05-04 1994-04-26 Bunn-O-Matic Corporation Grounds removal centrifuge
EP0635309B1 (fr) * 1993-07-22 1998-01-28 Sulzer-Escher Wyss AG Centrifugeuse à double poussoir
US5958235A (en) * 1997-08-22 1999-09-28 Baker Hughes Incorporated Continuous-feed filtering- or screening-type centrifuge with reslurrying and dewatering
ES2800499T3 (es) * 2014-02-26 2020-12-30 Ferrum Ag Centrífuga así como procedimiento para cargar una centrífuga
EP2959977B1 (fr) 2014-06-24 2018-10-03 Ferrum AG Centrifugeuse à poussoir double ainsi que système de plancher coulissant
KR102504657B1 (ko) * 2019-11-18 2023-02-27 주식회사 엘지화학 가압 원심 탈수기

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1065333B (de) * 1959-09-10 Gebr. Heine, Viersen (RhId.) Kontinuierlich arbeitende Siebzentrifuge mit einem gegenüber der Siebtrommel vor- oder nacheilend umlaufenden Boden
DE1114149B (de) * 1959-11-17 1961-09-21 Karl Marx Stadt Maschf Schubzentrifuge mit in beiden Hubrichtungen das Schleudergut austragendem Schubboden
DE1151468B (de) * 1961-06-27 1963-07-11 Karl Marx Stadt Maschf Schubzentrifuge mit in beiden Hubrichtungen das Schleudergut austragendem Schubboden
JPS4531109Y1 (fr) * 1967-03-10 1970-11-28
DE2542916B2 (de) * 1975-09-26 1980-08-07 Siebtechnik Gmbh, 4330 Muelheim Zweistufige Schubzentrifuge
JPS608872B2 (ja) * 1976-02-13 1985-03-06 厚木機械株式会社 汚水中の夾雑物除去脱水装置

Also Published As

Publication number Publication date
EP0068095A3 (en) 1984-05-23
DE3269565D1 (en) 1986-04-10
CA1169831A (fr) 1984-06-26
CH653573A5 (de) 1986-01-15
EP0068095A2 (fr) 1983-01-05
US4434052A (en) 1984-02-28
JPS5845760A (ja) 1983-03-17

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