EP0668108A1 - Séparateur centrifuge - Google Patents

Séparateur centrifuge Download PDF

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Publication number
EP0668108A1
EP0668108A1 EP95100702A EP95100702A EP0668108A1 EP 0668108 A1 EP0668108 A1 EP 0668108A1 EP 95100702 A EP95100702 A EP 95100702A EP 95100702 A EP95100702 A EP 95100702A EP 0668108 A1 EP0668108 A1 EP 0668108A1
Authority
EP
European Patent Office
Prior art keywords
air
separation chamber
collector
centrifugal separator
suction pipe
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
EP95100702A
Other languages
German (de)
English (en)
Other versions
EP0668108B1 (fr
Inventor
Richard Ott
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.)
Adolft & Albrecht Eirich KG
Original Assignee
Adolft & Albrecht Eirich KG
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 Adolft & Albrecht Eirich KG filed Critical Adolft & Albrecht Eirich KG
Publication of EP0668108A1 publication Critical patent/EP0668108A1/fr
Application granted granted Critical
Publication of EP0668108B1 publication Critical patent/EP0668108B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/086—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by the winding course of the gas stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C1/00—Apparatus in which the main direction of flow follows a flat spiral ; so-called flat cyclones or vortex chambers

Definitions

  • the invention relates to a centrifugal separator for broken grains, shells and fines, consisting of dust and other contaminants with a substantially annular pre-separation chamber with a horizontal axis, which is delimited by a semi-cylindrical outer wall and a suction pipe arranged with a horizontal axis, the pre-separation chamber at its one end is connected to a tangential raw gas inlet and at its other end to a funnel-shaped collector with discharge device formed below the pre-separation chamber and the inlet opening of the suction pipe is oriented towards the collector.
  • the inlet opening in the suction pipe is surrounded by a baffle formed concentrically to the suction pipe, which extends approximately around half the lower circumference of the suction pipe and which is at a lateral distance from the outer wall of the annular pre-separation space ends on both sides.
  • the air laden with fine grains and trays flows in the duct leading into the collector, while the second duct serves to return the air freed from the fine grains to the pre-separation chamber.
  • centrifugal separator is perceived as disadvantageous because, on the one hand, repeated circling of the suction pipe through the air laden with fine material leads to an increased pressure loss and, on the other hand, the fine material separated from the air reaches the collector together with the broken grains and the shells and is discharged together , so that a separation of the broken grains from the shells and the fines is not possible.
  • the object of the invention is to design the generic centrifugal separator in such a way that on the one hand the pressure loss is reduced and on the other hand a good separation of fine grains and the lighter impurities is made possible.
  • the part of the air loaded with the fine grains flows between the air guiding device and the outer wall of the pre-separation chamber into the collector and can then flow up to the suction pipe, freed from the grains. This not only reduces the pressure loss, but also enables the fine material to be separated from the fine grains, so that fine grains substantially freed of fine and light parts are obtained on the discharge device of the collector.
  • a particularly advantageous development of the invention consists in the fact that the air guiding device and the air outlet connected to it form a narrow peeling channel at the entry into the air outlet for the air flow which is forced against the guiding device by centrifugal action and is loaded with fine material.
  • the air outlet is formed by a pipe lying transversely to the direction of flow and arranged inside the collector, which has a tangential air inlet slot and the wall facing away from the centrifugal action of the inflowing air, which delimits the inlet slot, is pulled radially outwards somewhat and limits the peeling channel with the air guiding device.
  • the air guiding device is designed as a spiral-shaped baffle plate, which enables a particularly good separation effect with respect to the air laden with light and fine-grained impurities from the air laden with fine grains.
  • the air guiding device begins at a point in the annular pre-separation space at which the air flow is directed essentially perpendicularly downwards. This ensures that not only the centrifugal force but also the force of gravity acts on the fine grains, so that they get safely into the channel between the air guiding device and the outer wall of the pre-separation chamber and from there into the collector.
  • annular pre-separation chamber is designed with a cross-section that increases continuously in the flow direction.
  • Centrifugal separators of this type are used for the separation of the most diverse types of grain and other cereals, which have very different specific weights.
  • the cross section of the annular pre-separation space in the region of its downstream end in front of the air guiding device can be adjusted by means of a pivotable guide plate, the pivot axis of the guide plate is arranged on the suction pipe, while the free end extends downstream of the pivot axis.
  • the distance of the air guiding device from the outer wall of the pre-separation space can be adjustable in a further advantageous embodiment of the invention. It is advantageous if the air guiding device is designed in its front part in the flow direction as a pivotable flap, the free end of which is directed against the air flow.
  • the fine material consisting of dust and other fine impurities can be collected separately without environmental pollution.
  • the invention is explained in more detail below using an exemplary embodiment of a centrifugal separator shown in the drawing.
  • the single figure shows a cross section through a centrifugal separator according to the invention.
  • the centrifugal separator comprises an annular, pre-separation chamber 1 which extends in an arc shape and extends approximately over 180 ° and is delimited by an essentially semi-cylindrical outer wall 2 and a suction pipe 3.
  • a funnel-shaped collector 4 with a discharge screw 5 arranged below is provided below the pre-separation chamber 1 and the suction pipe.
  • a raw gas inlet 6 opens into the pre-separation chamber 1 in the tangential direction.
  • 7 denotes an inlet opening of the suction pipe 3 arranged with a horizontal axis, which is oriented downwards in the direction of the collector 4.
  • the suction pipe 3 is connected to the inlet 8 of a fan 9, the pressure-side outlet 10 of which is connected via a downward channel 11 to the lower end of an ascending aspiration channel 12, in the lower area of which via a feed roller 13 the task of cleaning Good things happen.
  • the upper end of the aspiration channel 12 opens into the raw gas inlet 6.
  • the suction pipe 3 is arranged eccentrically with respect to the semi-cylindrical outer wall 2 of the pre-separation chamber, in such a way that this suction pipe 3 on the one hand delimits a pre-separation chamber which widens continuously in the direction of flow and on the other hand shuts it off on the inlet side against the collector.
  • a single flow of the air entering the raw gas inlet 6 in the direction of the inlet opening 7 of the suction pipe 3 is compulsorily predetermined.
  • an air guiding device 14 designed as a spirally curved baffle plate is provided, which is at a distance from the outer wall 2 of the pre-separation space 1 and thus delimits a channel 15 between itself and the outer wall 2 in this area.
  • this channel 15 the portion of the air flow loaded with the heavy grains enters, so that the grains fall downward as a result of the relaxation occurring in the collector, while the air freed from the grains flows (upward) to the inlet opening 7 of the suction pipe 3.
  • the radially inner part of the air flow enters a channel 16 which is delimited by the suction pipe 3 and the air guiding device 14.
  • the air outlet 17 is designed as a horizontal tube 23, which runs transversely to the collector 4 and has a tangential air inlet slot 24, the wall facing away from the centrifugal action of the inflowing air and delimiting the inlet slot 24 being radially somewhat behind is pulled outside and delimits a peeling channel 25 with the air guiding device. This portion of the air flow entering the peeling channel 25 reaches the air outlet 17, which is connected to a filter device, not shown.
  • the remaining part of the air flow largely freed from fine parts, reaches the inlet opening 7 of the suction pipe 3 after deflection within the collector 4. From there, the air is sucked in by the fan 9 and printed into the downwardly directed duct 11. Thereupon the air rises in the aspiration channel 12 and serves to separate the material entered into this upward air flow into whole grains which are collected at the outlet 18 and into fine grains and other impurities which flow upwards into the raw gas inlet 6 reach.
  • the exemplary embodiment shown shows the centrifugal separator in connection with an aspiration channel for dividing the grain feed, part of which circulating air exits from the outlet 17 to the filter.
  • a pivotally mounted guide plate 19 is provided in the direction of failure in front of the air guide device 14 and is pivotally mounted about a pivot axis 20 arranged on the suction pipe 3.
  • the free end of this baffle plate serving as a regulating flap 19 extends downstream of the pivot axis 20.
  • the arrangement of the air baffle device 14 and the baffle plate 19 is such that in one end position the channel 16 defined between the air baffle device 14 and the suction pipe 3 can be completely closed . In the other end position, in which the guide plate 19 bears against the suction pipe 3, this channel 16 is completely open.
  • the intermediate positions serve to adapt the air flow to impurities or fine grains of different weights, the channel 16 being opened further in the case of heavier material and being closed further in the case of lighter fine grains.
  • a pivotable flap 21 is indicated by dash-dotted lines and forms the front end of the air guiding device 14 in the flow direction in order to be able to better adapt the air guiding device serving as a separating device to the different materials.
  • a regulating flap 22 is provided within the raw gas inlet 6, which allows the air quantity and the air speed to be adjusted in relation to the entry into the pre-separation chamber as a function of the air flow loaded with material.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Cyclones (AREA)
EP95100702A 1994-02-22 1995-01-19 Séparateur centrifuge Expired - Lifetime EP0668108B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4405642A DE4405642C2 (de) 1994-02-22 1994-02-22 Fliehkraftabscheider
DE4405642 1994-02-22

Publications (2)

Publication Number Publication Date
EP0668108A1 true EP0668108A1 (fr) 1995-08-23
EP0668108B1 EP0668108B1 (fr) 1999-05-12

Family

ID=6510876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100702A Expired - Lifetime EP0668108B1 (fr) 1994-02-22 1995-01-19 Séparateur centrifuge

Country Status (2)

Country Link
EP (1) EP0668108B1 (fr)
DE (2) DE4405642C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9138780B2 (en) 2011-05-03 2015-09-22 Bühler AG Device and method for separating feedstock into at least one light material fraction and a heavy material fraction
CN111188669A (zh) * 2018-11-14 2020-05-22 通用汽车环球科技运作有限责任公司 空气-油分离器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19604565A1 (de) * 1996-02-08 1997-08-14 Abb Patent Gmbh Trennvorrichtung zum Abscheiden von Feststoffpartikeln aus dem Gasstrom einer Wirbelschicht
USD735257S1 (en) 2011-05-03 2015-07-28 Bühler AG Grain separator
AT510708B1 (de) * 2011-06-03 2012-06-15 Wolfgang Dipl Ing Dr Techn Hoelbling Fliehkraftabscheider
AT515297B1 (de) 2014-01-22 2015-08-15 Wintersteiger Ag Vorrichtung zum Abscheiden eines körnigen Guts aus einem Förderluftstrom

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1620241A (en) * 1925-10-03 1927-03-08 Albert H Stebbins Air-volume dust reducer
GB571222A (en) * 1943-09-13 1945-08-13 Henry Withers Kickweed Jenning Improvements relating to dust separators
FR2231433A1 (en) * 1973-06-01 1974-12-27 Hauni Werke Koerber & Co Kg Tobacco dust separated from air - is discharged to chamber having further air outlet preventing pressure build up
DE3414344C2 (de) * 1984-04-16 1987-01-15 Gebrüder Bühler AG, Uzwil Fliehkraftabscheider

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101249A (en) * 1932-03-30 1937-12-07 Foster Wheeler Corp Pneumatic classifier
DE2109489B2 (de) * 1971-03-01 1974-09-26 Buehler-Miag Gmbh, 3300 Braunschweig Steigsichter zum Fraktionieren aus einer Mühle pneumatisch ausgetragenen Gutes
DE3912077C2 (de) * 1989-04-13 1993-11-04 Happle Gmbh & Co Maschf Reinigungsmaschine fuer koerniges reinigungsgut

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1620241A (en) * 1925-10-03 1927-03-08 Albert H Stebbins Air-volume dust reducer
GB571222A (en) * 1943-09-13 1945-08-13 Henry Withers Kickweed Jenning Improvements relating to dust separators
FR2231433A1 (en) * 1973-06-01 1974-12-27 Hauni Werke Koerber & Co Kg Tobacco dust separated from air - is discharged to chamber having further air outlet preventing pressure build up
DE3414344C2 (de) * 1984-04-16 1987-01-15 Gebrüder Bühler AG, Uzwil Fliehkraftabscheider

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9138780B2 (en) 2011-05-03 2015-09-22 Bühler AG Device and method for separating feedstock into at least one light material fraction and a heavy material fraction
CN111188669A (zh) * 2018-11-14 2020-05-22 通用汽车环球科技运作有限责任公司 空气-油分离器

Also Published As

Publication number Publication date
EP0668108B1 (fr) 1999-05-12
DE59505874D1 (de) 1999-06-17
DE4405642A1 (de) 1995-08-24
DE4405642C2 (de) 1996-11-07

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