EP0602557B1 - Appareil d'alimentation - Google Patents

Appareil d'alimentation Download PDF

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Publication number
EP0602557B1
EP0602557B1 EP19930119923 EP93119923A EP0602557B1 EP 0602557 B1 EP0602557 B1 EP 0602557B1 EP 19930119923 EP19930119923 EP 19930119923 EP 93119923 A EP93119923 A EP 93119923A EP 0602557 B1 EP0602557 B1 EP 0602557B1
Authority
EP
European Patent Office
Prior art keywords
air
deflector
feeder
separation
plate
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 - Lifetime
Application number
EP19930119923
Other languages
German (de)
English (en)
Other versions
EP0602557A1 (fr
Inventor
Werner Haelg
Hans Baumeler
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.)
Buehler AG
Original Assignee
Buehler 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 Buehler AG filed Critical Buehler AG
Publication of EP0602557A1 publication Critical patent/EP0602557A1/fr
Application granted granted Critical
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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
    • 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
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents

Definitions

  • the invention relates to a feeder according to the preamble of claim 1.
  • One- and two-stage separators for separating dust and / or heavy parts from an air stream are known in principle.
  • the air introduced for separation transverse to the material flow is deflected after a heavy part separation area with a heavy part collecting device in a separation area and essentially separated from the fine fraction of the material to be ground and then fed back to the heavy part separation area via a fan.
  • the air flow is discharged via a central sieve pipe in the heavy-duty parting device, which, however, is covered by flat light parts such as B. paper or film parts is significantly impaired in its function.
  • the device described is also characterized by a considerable space requirement.
  • DE-OS 38 12 229 describes a circulating air classifier with an annular cylindrical viewing space in which the viewing air is supplied tangentially via a spiral or annular inlet channel for the purpose of generating swirl.
  • the coarse material is discharged in an outlet funnel and the fine material is separated in a cyclone. Sifter and cyclone are separate units.
  • a centrifugal separator is known from DE 31 14 344. It has an aspiration channel and a partially air-impermeable jacket within the suction channel.
  • DE-OS 31 22 052 teaches to arrange an adjustable inflow guide vane to avoid pressure losses and to prevent inadequate separation of solids.
  • the DE-OS 32 23 374 teaches a screw-shaped dip tube with a diffuser-like design in a cyclone. Both solutions are comparatively complex.
  • the present invention is therefore based on the object of developing a compact feed apparatus with recirculating air operation which, in the case of conventional regrinds, enables the separation of light and heavy parts and their complete readout, and which is also of simple construction.
  • the two deflection surfaces include a central and partially open suction channel to the suction fan.
  • the central suction channel can also be designed as a perforated sieve tube if very high demands are placed on operational safety or if the fluid / regrind consistently contains flat light parts.
  • An air distribution device is arranged between the separating space and the suction fan in order to divide the circulating air flow over the entire width, which significantly improves the reading.
  • the high separation rate also reduces wear on the suction fan due to flowing fine particles.
  • a spring base is arranged in an inlet of the housing of the supply apparatus, which spring base consists of a spring tongue plate, the spring tongues being firmly clamped on one side and on the side facing the inlet. This design increases functional safety by preventing heavy parts, especially pieces of wood, from being caught.
  • the arrangement of the baffles according to the invention brings about a high acceleration of the fluid-solid flow in the separation space and a two-stage separation of fine parts.
  • the arrangement of the air distribution device consisting of a curved plate and a flap located horizontally thereto, enables the air flow to be uniform over the entire width of the separating space to distribute and fully exploit. This in turn allows a very compact design of the feeder.
  • the air flow loaded with fine particles is first deflected on the side of the first baffle plate facing away from the suction channel and subsequently on the side of the second baffle plate facing away from the suction channel, which effects a complete separation of the fine particles.
  • the arrangement of the second baffle prevents the penetration of fine parts, in particular also paper or plastic films, into the suction fan or clogging of the sieve tube.
  • the heavy parts contained in the air flow are separated as the least distracted components in a heavy parts collecting container before they can penetrate into the aforementioned separation space.
  • An exemplary embodiment of a feed apparatus consists of a housing 1 of a circulating air separation device with an inlet 11 for the solid mixture and an outlet 12, an outlet of a heavy part collecting container 9 and a flanged suction fan 2.
  • a first baffle plate 4 and a second baffle plate are in a separation space 3 of the circulating air separation device 5 arranged approximately concentrically around a perforated sieve tube 10. In their arrangement with respect to the curved wall of the separating space 3 or to the sieve tube 10, the baffles form accelerating feed channels which effect a centrifugal separation of particles.
  • a magnetic separating device 8 is arranged in the direction of the outlet 12 and an air distribution device, consisting of a curved plate 6 and a flap 7 located horizontally thereto, is arranged between the separating space 3 and a suction fan 2.
  • a spring base 13 which consists of a spring tongue plate, is arranged in the inlet 11 for the ground material flow.
  • the individual spring tongues were worked out of a sheet metal, the base of which is firmly clamped on the side facing the inlet 11.
  • the ground material flow to which recirculated air is applied is fed to a feed device of a machine (not shown) (for example a hammer mill) via inlet 11.
  • a machine for example a hammer mill
  • Heavy parts are already emptied in the heavy parts collecting container 9 before they reach the centrifugal separation area of the separation chamber 3.
  • the fine fraction of the ground material is deflected with the air at the deflection surface 4 and remains in the centrifugal separation area as a result of the centrifugal forces and is accelerated again at the second deflection plate 5.
  • the circulating air entered for separation is sucked in via a duct consisting of the perforated sieve tube 10 and returned to the suction fan 2 via a return pipe. While the largest proportion of the fine fraction carried by the air is separated from the air and reaches the outlet 12, the remaining fine fraction is deflected by the second deflecting surface 5, separated from the air and likewise reaches the outlet 12.
  • the magnetic separating device 8 is arranged in the outlet 12 in order to separate magnetic parts carried along.
  • the width of the air distribution is increased by means of the air distribution device 6, 7. This improves the reading and enables all products to be separated from light and heavy components.
  • the sieve tube 10 can be easily removed. This is used in particular when the regrind contains no or hardly flat light parts. An impairment of the separation effect cannot be determined if the screen tube 10 is dispensed with.
  • the feed apparatus according to the invention has the advantage of consisting of only a few components and thereby achieving almost complete separation. No filters are used and no foreign air remains in the regrind.
  • the feeder is very low-maintenance and, thanks to the closed and compact design, environmentally friendly. Compared to comparable, conventional facilities, there is also a significant reduction in energy consumption.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Claims (5)

  1. Appareil d'alimentation, en particulier pour le tri des particules lourdes, comprenant une chambre de séparation (3) délimitée par une paroi incurvée d'un carter (1) et pourvue d'une première surface déflectrice (4) et d'une seconde surface déflectrice (5), appareil comportant un dispositif collecteur de particules lourdes (9) et un dispositif de séparation dans lequel l'air est séparé de la fraction fine de matières broyées, puis réalimenté dans la zone de séparation à l'intervention d'un ventilateur (2), caractérisé en ce que
    les surfaces déflectrices (4, 5) donnent forme à un couloir d'aspiration central et partiellement ouvert, la périphérie de la surface déflectrice (4) s'étendant loin au-delà de la bissectrice verticale de la chambre de séparation (3) et constituant ainsi, avec la paroi du carter (1), un couloir d'accélération,
    en ce que la seconde tôle déflectrice (5) constitue la prolongation circulaire de la première tôle déflectrice (4), en aval d'une interruption,
    et en ce que l'extrémité de fuite dirigée vers la première tôle déflectrice (4) donne naissance, avec cette dernière, à un autre couloir accélérant l'alimentation.
  2. Appareil d'alimentation selon la revendication 1, caractérisé en ce qu'un dispositif répartiteur d'air, constitué d'une tôle cintrée (6) et d'un registre (7) agencé horizontalement à cette dernière, est placé devant l'orifice d'alimentation de l'air dans la chambre de séparation (3).
  3. Appareil d'alimentation selon l'une des revendications 1 et 2, caractérisé en ce que le couloir d'aspiration central est matérialisé par un crible tubulaire (10).
  4. Appareil d'alimentation selon l'une des revendications 1 à 3, caractérisé en ce que l'appareil d'alimentation est un séparateur à circulation d'air à deux étages.
  5. Appareil d'alimentation selon l'une des revendications 1 à 4, caractérisé en ce qu'un fond flexible (13) constitué d'une tôle à lames flexibles, est placé dans un orifice d'admission (11) du carter (1), lesdites lames flexibles étant solidement enserrées unilatéralement, du côté orienté sur l'orifice d'admission (11).
EP19930119923 1992-12-18 1993-12-10 Appareil d'alimentation Expired - Lifetime EP0602557B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3875/92 1992-12-18
CH387592 1992-12-18

Publications (2)

Publication Number Publication Date
EP0602557A1 EP0602557A1 (fr) 1994-06-22
EP0602557B1 true EP0602557B1 (fr) 1997-02-05

Family

ID=4265366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930119923 Expired - Lifetime EP0602557B1 (fr) 1992-12-18 1993-12-10 Appareil d'alimentation

Country Status (4)

Country Link
EP (1) EP0602557B1 (fr)
DE (1) DE59305399D1 (fr)
DK (1) DK0602557T3 (fr)
ES (1) ES2099359T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1413532A1 (fr) * 2002-10-21 2004-04-28 Bühler AG Alimentateur
USD735257S1 (en) 2011-05-03 2015-07-28 Bühler AG Grain separator

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102600954A (zh) * 2012-03-24 2012-07-25 华电电力科学研究院 双蜗壳式煤粉分离器
CN103624003B (zh) * 2013-11-03 2015-10-14 宁波市鄞州青林医疗器械技术咨询有限公司 中药饮片离心送风式除屑机
DE102018132155B3 (de) * 2018-12-13 2019-12-12 Netzsch-Feinmahltechnik Gmbh Fliehkraftsichter mit speziellem sichterrad

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI54681C (fi) * 1971-09-27 1979-02-12 Insinoeoeritoimisto Engineerin Pneumatiskt klassificeringsfoerfarande och pneumatisk klassificerare foer utfoerande av foerfarandet
JPS60835A (ja) * 1983-06-17 1985-01-05 山本　惣一 籾摺装置
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
EP1413532A1 (fr) * 2002-10-21 2004-04-28 Bühler AG Alimentateur
USD735257S1 (en) 2011-05-03 2015-07-28 Bühler AG Grain separator

Also Published As

Publication number Publication date
DE59305399D1 (de) 1997-03-20
EP0602557A1 (fr) 1994-06-22
ES2099359T3 (es) 1997-05-16
DK0602557T3 (da) 1997-07-28

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