EP0168601A2 - Dispositif pneumatique et évacuation pour centrifuge à racleur - Google Patents

Dispositif pneumatique et évacuation pour centrifuge à racleur Download PDF

Info

Publication number
EP0168601A2
EP0168601A2 EP85106471A EP85106471A EP0168601A2 EP 0168601 A2 EP0168601 A2 EP 0168601A2 EP 85106471 A EP85106471 A EP 85106471A EP 85106471 A EP85106471 A EP 85106471A EP 0168601 A2 EP0168601 A2 EP 0168601A2
Authority
EP
European Patent Office
Prior art keywords
peeling
discharge device
pneumatic discharge
head
filling body
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.)
Withdrawn
Application number
EP85106471A
Other languages
German (de)
English (en)
Other versions
EP0168601A3 (fr
Inventor
Peter Dipl.-Ing. Ostermeyer (Fh)
Manfred Ing.(Grad.) Scherer
Richard Ing.(Grad.) Widmann
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.)
Mannesmann Demag Krauss Maffei GmbH
Original Assignee
Krauss Maffei 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 Krauss Maffei AG filed Critical Krauss Maffei AG
Publication of EP0168601A2 publication Critical patent/EP0168601A2/fr
Publication of EP0168601A3 publication Critical patent/EP0168601A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof

Definitions

  • the invention relates to a pneumatic discharge device for a peeling centrifuge according to the preamble of the main claim.
  • Such a pneumatic discharge device is known in particular from DE-PS 20 56 893.
  • the discharge device described therein is designed as an oscillating peeling device which has to be moved up and down in order to be able to carry out the entire peeling material located in the peeling centrifuge.
  • the peeling head arranged inside the centrifuge drum at the front end of the discharge line must also be fed in the radial direction in order to remove as much as possible of the peeling material which is deposited on the inside of the drum.
  • the known pneumatic discharge device is also disadvantageous insofar as only a low overall discharge efficiency is achieved due to the requirement of the reciprocating movement. Furthermore, due to the fact that the peeling material cannot be carried out completely from the drum, the remaining layer is added by constantly sweeping the knife, especially when there is a high residual moisture. As a result, this residual layer filters out very poorly in the subsequent batches and may have to be cleared by hand.
  • the invention has for its object to provide a generic pneumatic discharge device which avoids the problems which usually occur with axial movements of the peeling knife and at the same time enables an extraordinarily high discharge rate.
  • the arrangement of the peeling knife over the entire drum width results in an extremely high discharge efficiency reached. This makes it possible to discharge the drum contents at the full speed. Furthermore, an axial movement of the discharge device is avoided, so that large sealing problems do not arise from the outset. The risk of abrasion and contamination entering the peeling material is thus reduced to a minimum.
  • the peeling knife arranged over the entire drum width it is also possible, by means of appropriate control, to keep the cutting speed constant over the radius of the drum when the material to be peeled is removed in the direction of the drum casing.
  • the peeling head When the end position near the drum shell is reached, the peeling head is immediately withdrawn by a corresponding reversal, so that clogging of the remaining layer is avoided. When further batches are filtered out, the remaining layer remains permeable to filtrate.
  • the pneumatic discharge device is not only characterized in that it is able to remove a lot of peeling material, but also in that it has an extremely high discharge efficiency.
  • This high discharge efficiency is achieved according to a basic concept of the invention in that a filler is arranged in the interior of the peeling head, which influences the conveying flow in a critical area of peeling material in which the peeling material particles strongly tend to settle in the peeling head. that the suction speed at and in front of this point is increased, so that the peeling material particles separated from the peeling knife and falling down are taken up by the conveying flow and entrained.
  • the packing according to the invention can be replaced in the case of a changed peeling material and the flow conditions thus changed and replaced by a new filler suitable in shape and size.
  • the packing can also be designed so that it can be adapted to the changed flow conditions during operation.
  • the filler according to the invention has a product guide surface on the side facing the peeling material flow, which leads the peeling material flow downwards. If the peeling material is changed accordingly, the packing can also be changed in such a way that the product flow moves downwards in free fall and does not touch the product guide surface.
  • the product guide surface is aligned with the discharge parabola of the peeled material.
  • the product guide surface is connected to a partial suction channel surface which is semi-parabolic and, together with an outer deflection path, forms an extension of the discharge line.
  • the flow cross-section delimited by the suction duct partial area and the outer deflection path is circular, so that there are no places where the peeled material could settle and clog the discharge duct.
  • an increase in the suction speed is indicated if heavier particles of peelable material could fall back from a vertical flow dryer duct.With an increase in the flow rate, the heavier particles can also be carried away by the flow, thus preventing the discharge cross-section from becoming blocked.
  • the packing according to the invention has fluidization nozzles arranged in the product guide surface.
  • these fluidizing nozzles produce a gas cushion on which the peeling material is guided downwards, similar to a fluidized bed.
  • a dryer downstream of the centrifuge can also operate in a preferred operating range, since its evaporation capacity remains constant insofar as the product of mass flow and initial peel material moisture can be kept constant.
  • FIG. 1 shows schematically the vertical section of a drum 1 of a vertical peeling centrifuge.
  • the drum has a casing 3, a base 5, a hub 7 and a rim 9.
  • the inner edge of the rim 9 delimits an opening 11 through which a discharge line 13 and a head 15 arranged on the discharge line 13 are inserted into the drum interior 17.
  • the discharge line 13, together with the peeling head 15, can be pivoted in the radial direction of the drum 1 in the drum interior 17 with a device (not shown) arranged outside the drum 1.
  • the peeling head 15 comprises in particular a peeling surface 19 adjacent to the inner wall of the casing, a peeling knife 21 arranged on the front edge of the peeling surface, a funnel surface 23 arranged opposite the peeling surface 19, an upper guide wall 25 and a filling body 27 according to the invention arranged on the upper guide wall 25, which extends essentially downwards in the direction of a ramp 29. It can clearly be seen from FIG. 1 that the peeling head 15 with the cutting knife arranged on its front extends essentially over the entire drum width. In this context, be on it noted that here, as is common in centrifuge construction, the dimension that determines the extent of the jacket 3 between the board 9 and the bottom 5 is referred to as the drum width.
  • the peeling head 15 is pivotable in the interior of the drum in the radial direction, so that when discharging the peeling knife 21 attached to the front of the peeling head 15 is rotated against the peeling material which has accumulated on the inside of the jacket 3 and together with the drum 1 rotates in the direction of arrow 31.
  • the peeling knife 21 sticks into the peeling material layer, the peeling material thus separated falls into the peeling head in the form of a parabola, is entrained by a suction air flow and discharged in the direction of arrow 33.
  • the peeling head 15 has in its interior the filling body 27, which is fastened to the guide wall 25, extends downwards in the direction of the ramp 29 and constricts the delivery flow indicated by the arrows 35.
  • the arrows 37 indicate how the peeling knife 21 cuts into the material to be peeled and separates it. The peeling material then falls into the peeling head in the direction of the dashed lines.
  • the separated peeling material is already penetrated by the conveying flow indicated by the arrows 35, which is so strong due to the nozzle effect between the packing 27 and the ramp 29 and / or its continuation in the outer deflection path 39 that the peeling material is so strong that the peeling material particles are carried along during the flight and discharged in the direction of arrow 33.
  • the special arrangement of the filler 27 and the nozzle effect caused thereby ensure that, in particular in a critical peeling-off area 41, the falling peeling-off particles cannot settle in the peeling head, but are taken up and carried away by the conveying flow.
  • the conveying flow can be formed by a drying gas, in particular in the case of moist peeling material.
  • the filling body 27 is formed with a product guiding surface 43 adjoining the peeling material flow and with a suction duct partial surface 45 which delimits the conveying flow in the suction duct. Both areas are connected in their lower area.
  • the product guide surface 43 can be formed at its lower end with a tear-off edge 47 in order to further promote the swirling of the peeled material with the conveying flow and to increase the efficiency of the entire suction.
  • fluidizing nozzles 49 are arranged within the packing 27, which blow gas between the product guiding surface 43 and the peeling material so as to prevent the peeling material from sticking.
  • Both the product guide surface 43 and the suction duct sub-surface 45 can be changed in their outer shape when the product to be discharged is changed.
  • the product guide surface 43 can be moved towards or away from the peeling material flow and the suction channel sub-surface 45 can be moved into or out of the conveying flow 35.
  • a change in the conveying flow 35 through the suction duct sub-area 45 is indicated in particular when the flow velocity in a vertical part of the discharge device is to be increased. This measure is taken when it becomes apparent that the particles agglomerate during their removal, thereby becoming heavier and falling back into the peeling head.
  • the filling body 27 can optionally also be exchanged and replaced by another filling body which has the outer peripheral surfaces modified by the conditions imposed by a new peeling material.
  • the filler can also be changed in position and shape during operation.

Landscapes

  • Centrifugal Separators (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Confectionery (AREA)
EP85106471A 1984-07-18 1985-05-25 Dispositif pneumatique et évacuation pour centrifuge à racleur Withdrawn EP0168601A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3426526 1984-07-18
DE3426526A DE3426526A1 (de) 1984-07-18 1984-07-18 Pneumatische austragvorrichtung fuer eine schaelzentrifuge

Publications (2)

Publication Number Publication Date
EP0168601A2 true EP0168601A2 (fr) 1986-01-22
EP0168601A3 EP0168601A3 (fr) 1987-09-23

Family

ID=6240982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106471A Withdrawn EP0168601A3 (fr) 1984-07-18 1985-05-25 Dispositif pneumatique et évacuation pour centrifuge à racleur

Country Status (6)

Country Link
US (1) US4676770A (fr)
EP (1) EP0168601A3 (fr)
JP (1) JPS6135862A (fr)
DE (1) DE3426526A1 (fr)
GB (1) GB2161713A (fr)
IN (1) IN162690B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8900113D0 (sv) * 1989-01-13 1989-01-13 Alfa-Laval Separation Ab Anordning foer omvandling av kinetisk energi till tryckenergi
US5087127A (en) * 1990-07-05 1992-02-11 Benjamin Knelson Removal of concentrate from a centrifugal separator
CN102698888B (zh) * 2012-05-18 2014-04-09 江苏赛德力制药机械制造有限公司 一种离心机中的刮刀吸料装置
CN106824566A (zh) * 2017-02-15 2017-06-13 张家港市通江机械有限公司 平板式全自动羽绒脱水机
CN112405036B (zh) * 2020-10-29 2022-12-13 万金机械配件(东莞)有限公司 一种多方向固定且能降温除屑的铝合金加工机床

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE468169C (de) * 1928-11-07 Mensinga & Meyer Vorrichtung zur selbsttaetigen Entleerung von Zentrifugen mittels eines Schaelrohrs
DE578004C (de) * 1933-06-08 Gustav Ter Meer Dr Ing Austragvorrichtung fuer Schaelschleudermaschinen
GB453653A (en) * 1934-03-09 1936-09-15 American Centrifugal Corp Improvements in continuous automatic centrifugal separating machines
GB474534A (en) * 1936-07-08 1937-11-03 Joseph Samuel Pecker Centrifugal separating machines
DE2056893A1 (de) * 1970-06-09 1972-05-04 Titus, Hans-Joachim, 6148 Heppenheim Vorrichtung zum Schälen und pneumatischen Austragen von Filterzentrifugen. Ausscheidung aus: 2028267

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1925121A (en) * 1931-01-27 1933-09-05 Albert T Otto & Sons Discharging device for centrifugal machines
US2779473A (en) * 1955-03-15 1957-01-29 Stork Koninklijke Maschf Continuously operating centrifugal machine
DE1432886A1 (de) * 1964-03-03 1969-10-23 Titus Hans Joachim Verfahren zum Ausraeumen von Vertikal-Zentrifugen
AU420630B2 (en) * 1967-06-19 1972-01-17 Fibremakers Limited Improvements in or relating to winding yarn packages
US3734398A (en) * 1971-02-26 1973-05-22 Pennwalt Corp Basket centrifuge with material removing means
US4063715A (en) * 1976-09-03 1977-12-20 Felker Paul J Material mixer-triturator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE468169C (de) * 1928-11-07 Mensinga & Meyer Vorrichtung zur selbsttaetigen Entleerung von Zentrifugen mittels eines Schaelrohrs
DE578004C (de) * 1933-06-08 Gustav Ter Meer Dr Ing Austragvorrichtung fuer Schaelschleudermaschinen
GB453653A (en) * 1934-03-09 1936-09-15 American Centrifugal Corp Improvements in continuous automatic centrifugal separating machines
GB474534A (en) * 1936-07-08 1937-11-03 Joseph Samuel Pecker Centrifugal separating machines
DE2056893A1 (de) * 1970-06-09 1972-05-04 Titus, Hans-Joachim, 6148 Heppenheim Vorrichtung zum Schälen und pneumatischen Austragen von Filterzentrifugen. Ausscheidung aus: 2028267

Also Published As

Publication number Publication date
GB8511328D0 (en) 1985-06-12
US4676770A (en) 1987-06-30
DE3426526A1 (de) 1986-01-30
IN162690B (fr) 1988-07-02
EP0168601A3 (fr) 1987-09-23
JPS6135862A (ja) 1986-02-20
GB2161713A (en) 1986-01-22

Similar Documents

Publication Publication Date Title
EP0346278B1 (fr) Dispositif de traitement de semences
EP2832200B1 (fr) Procédé et dispositif de dosage de matériel granulaire
DE68912535T2 (de) Pneumatischer Förderer für körniges Material und Saugdüse für die Verwendung in einem solchen Förderer.
DE2018684B2 (de) Vorrichtung zum Abtrennen einer Flüssigkeit aus einem Brei, Schlamm o.dgl
DE2930581A1 (de) Zentrifuge zum sortieren und trennen von feststoffen
DE2552763C3 (de) Verfahren und Vorrichtung zum Vereinzelnen von verhängenden oder aneinander haftenbleibenden Montageteilen
DE4140584A1 (de) Vorrichtung zum trennen einer materialmischung aus materialien mit unterschiedlichem spezifischem gewicht
DE19618198C1 (de) Produktabscheider
DE3241299C2 (fr)
CH660073A5 (de) Vakuum-trocken-vorrichtung.
DE3418997C2 (fr)
EP0168601A2 (fr) Dispositif pneumatique et évacuation pour centrifuge à racleur
DE2720340B2 (de) Verfahren und Vorrichtung zum Abscheiden von Faserflocken aus einem Transportluftstrom in einen Ablagerungsschacht
DE3831256C1 (fr)
DE4000571C1 (fr)
DE69219906T2 (de) Verteiler für partikelförmige materialien
DE1657232B1 (de) Verfahren und Vorrichtung zum Herstellen eines kontinuierlichen Stranges aus schuettfaehigen,faserigen Teilchen,insbesondere aus Schnittabak
DE3318313C2 (de) Gerät zum Trocknen oder zum Trocknen und Sichten von pulverförmigem Material
EP0163026B1 (fr) Véhicule pour la distribution et le mélange de fourrage ensilé et d'autres aliments pour le bétail
EP0163112A2 (fr) Procédé et dispositif pour la séparation centrifuge de mélanges de minéraux à grains fins
DE1940922C3 (de) Kunstdüngerstreuer
WO2019105700A2 (fr) Dispositif de tamisage
DE4336453A1 (de) Verfahren und Vorrichtung zum Vereinzeln von Tabakfasern
EP0509252B1 (fr) Appareil pour le triage de matières en vrac à duretés différentes
DE69304896T2 (de) Regelbare dosiervorrichtung für pulverförmiges material

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH FR GB IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19880304

RIN1 Information on inventor provided before grant (corrected)

Inventor name: OSTERMEYER, PETER, DIPL.-ING. (FH)

Inventor name: WIDMANN, RICHARD, ING.(GRAD.)

Inventor name: SCHERER, MANFRED, ING.(GRAD.)