EP0427679A2 - Dispositif de fractionnement de matières granuleuses - Google Patents

Dispositif de fractionnement de matières granuleuses Download PDF

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Publication number
EP0427679A2
EP0427679A2 EP19900810848 EP90810848A EP0427679A2 EP 0427679 A2 EP0427679 A2 EP 0427679A2 EP 19900810848 EP19900810848 EP 19900810848 EP 90810848 A EP90810848 A EP 90810848A EP 0427679 A2 EP0427679 A2 EP 0427679A2
Authority
EP
European Patent Office
Prior art keywords
flow
mask
level
concentrator
area
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
EP19900810848
Other languages
German (de)
English (en)
Other versions
EP0427679A3 (fr
EP0427679B1 (fr
Inventor
Eberhard Dipl.-Ing. Funke
Eberhard Plee
Siegfried Dipl.-Ing. Voigt
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.)
WIRTH MUEHLENBAU DRESDEN GMBH
Original Assignee
Wirth Muehlenbau Dresden GmbH
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 Wirth Muehlenbau Dresden GmbH filed Critical Wirth Muehlenbau Dresden GmbH
Publication of EP0427679A2 publication Critical patent/EP0427679A2/fr
Publication of EP0427679A3 publication Critical patent/EP0427679A3/fr
Application granted granted Critical
Publication of EP0427679B1 publication Critical patent/EP0427679B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B4/00—Separating by pneumatic tables or by pneumatic jigs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B4/00—Separating by pneumatic tables or by pneumatic jigs
    • B03B4/02—Separating by pneumatic tables or by pneumatic jigs using swinging or shaking tables
    • 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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements

Definitions

  • the invention is used to prepare granular goods for further processing, e.g. in mills and relates to a device for separating granular material, consisting of a stone selection level and a concentrator level, which is arranged above the stone selection level and is divided into a stratification area and a flow area, the flow area with respect to the direction of flow of the material flow following the stratification area and is arranged in a plane therewith, has a flow mask, the perforation of which is larger than the particles of the material to be separated and is inclined in the direction of flow of the material flow to be separated.
  • the task of grain cleaning is to remove any contaminants (foreign matter, dirt, seeds, eaten grains, etc.) from the grain before grinding. Traditionally, this is done in particular by sieving, sifting, stone selection and cell selection. Due to the relatively high mass flow, however, this does not always take place to the desired extent or a very high level of technical effort is required.
  • EPA 162 014 discloses a solution in which the grain flow is divided into at least two using the so-called fluidized bed. in the respective fractions, depending on the density or the suspension speed of the components concentrates the specifically light admixtures (seeds, organic trimmings) on the one hand and the specifically heavier admixtures (stones) on the other.
  • this method is suitable for combination with the above-mentioned readout methods (eg concentrator / stone reader or wind sifter, or the triple combination).
  • the characteristic of this solution is the use of one or two fluidized bed levels.
  • the grain is always separated into at least two fractions on the upper fluidized bed level, and stones are selected on the lower fluidized bed level.
  • the light fraction also called mixed fraction
  • the heavy fraction contains almost only stones from the foreign components that are read out on the lower fluidized bed level. If two fluidized bed levels are present, the same air flows through them successively, so that the air required is practically used twice.
  • the upper fluidized bed level is divided into two functionally different parts:
  • the first part ie the part from the inlet to about the middle of the level, is equipped with fine-mesh wire mesh or perforated sheet with small holes, which is only flowed through by air in the direction from bottom to top and no rorn material falls through.
  • stratification which is very important for grain separation, forms in the direction of flow.
  • the good, specifically heavy grain and the stones brought along accumulate.
  • Inferior, specifically lighter grain and organic admixtures accumulate in the upper part of the layer, such as seeds, chaff and straw parts.
  • the subsequent second part of this level is equipped with perforated plates, the openings of which are larger, usually several times larger than the individual grains of the grain to be separated.
  • This perforated plate does not have the function of a sieve, i.e. Separate by grain size, but acts as a flow mask.
  • the air flowing through from below should only allow the grains flowing on the underside of the grain layer to be specifically heavier and the stones to fall through without disturbing the basic structure of the layering and its movement.
  • the air passage through the stone selection level is greater in the area of the stone outlet than on the side of the grain outlet.
  • the air requirement is rather reversed.
  • the air flows are therefore compensated for, that is to say the air does not flow perpendicularly, but rather obliquely in the direction of inclination, through the fall area of the concentrator level. The consequence of this is excessive acceleration and thus unwanted mixing of the grain layer in this area.
  • the aim of the invention is to eliminate the disturbances mentioned and thereby to improve the quality of the separation process.
  • the invention has for its object to prevent the mixing of the grain in the layer flowing above the diarrhea area of the concentrator level.
  • a second flow mask is arranged below the first flow mask, the open areas of which are at least the same size or larger than that of the first flow mask and the distance between the flow masks corresponds at least to the size of the particles of the material falling through and transverse webs ( 11) are arranged perpendicular to the plane of the flow masks, transversely to the direction of flow of the material flow and without covering the holes in the upper flow mask.
  • Such a machine consists of a housing 2 which is capable of oscillation and is driven by an unbalance motor 1 and which executes a directional oscillating movement.
  • this Gehfiuse 2 are firmly connected, but adjustable in their inclination, the concentrator level 3 and below the stone level 4 arranged.
  • the stone outlet 5 is located at the upper end of the stone selection level 4.
  • the concentrator level 3 is subdivided into the stratification area 6, which is covered with a fine vibrating sieve fabric (clear mesh size approx. 1 mm) and the diarrhea area 7, which has a perforated plate with a hole diameter of preferably 8 ... 12 mm (for Korngut Weien) as the top plate 8 and a perforated plate with a hole diameter of 9 ... 14 mm is fitted as the lower plate 9.
  • the diarrhea area 7 is subdivided into compartments 10 below the upper sieve 8 transversely to the direction of flow of the grain material, in such a way that the transverse webs 11 each abut the ribs 12 of the upper sieve 8 and thus do not divide or partially close the openings thereof.
  • the crosspieces 11 can be arranged after each row of holes or after several rows of holes in the top wire 8.
  • the distance between top plate 8 and bottom plate 8 should at least correspond to the size of the grains, but not exceed a maximum of 10 times the size.
  • the crosspieces 11 can divide or partially hide the holes in the lower plate 9.
  • the inlet 13 for the grain is arranged at the upper end of the concentrator level 3, the light fraction outlet 14 is arranged at the lower end of the diarrhea area 7 of the concentrator level 3 net.
  • the suction hood 15 extends over the entire length of the concentrator elements 3. For better regulation of the working effect, the suction hood 15 is divided in the longitudinal direction into chambers 16 which have separate air controls 17. In addition, a throttle valve 18 is arranged in the air extraction system 19 for regulating the total air throughput.
  • Inlet 13 and suction hood 15 do not vibrate in this exemplary embodiment and are connected to the box 2 by an airtight flexible cloth 20.
  • the design can also be carried out in such a way that the inlet 13 and the suction hood 15 are firmly connected to the housing 2 and resonate.
  • the subdivision of the suction hood 15 into a plurality of chambers 16 can be omitted in other versions, but this usually results in a reduced work effect.
  • the grain material runs through the inlet 13 into the machine and reaches the stratification area 8 of the concentrator level 3 evenly distributed over the entire width.
  • the air flowing through fluidizes the grain material, so that it flows off uniformly in the direction of inclination of the concentrator plane 3.
  • stratification takes place according to the density or floating speed of the constituents of the grain material.
  • Specifically heavy components are arranged on the underside, specifically light components are arranged on the top of the grain layer.
  • the grains swirled in the compartments 10 and the transverse webs 11 thereby have a very positive effect for a uniform turbulent air flow through the openings in the top plate 8.
  • Air currents directed obliquely upwards can no longer continue upwards due to the conditions below the concentrator level 3 and therefore no longer lead to a mixing of the rye material layer flowing on the top plate 8, that is to say the basic layering is retained despite the diarrhea of specifically heavy grain .
  • Another positive effect of the solution according to the invention is better controllability of the work quality of the concentrator level 3 with the aid of the air regulation 17 of the individual chamber 16.
  • the stone selection level 4 works according to the known principle: while the cereal grains flow fluidized in the direction of flow through the heavy fraction outlet 21 through the flowing air, the stones are counteracted by the directional oscillating movement of the stone selection level 4, which is covered with fine-meshed vibrating sieve fabric, against the tendency towards the stone outlet 5 promoted. A higher air speed is formed under the adjustable cover plate 22, so that grain grains carried up to there are blown in the direction of the heavy fraction outlet 21.
EP90810848A 1989-11-06 1990-11-06 Dispositif de fractionnement de matières granuleuses Expired - Lifetime EP0427679B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD334278 1989-11-06
DD89334278A DD288762A5 (de) 1989-11-06 1989-11-06 Einrichtung zur trennung von koernigem gut

Publications (3)

Publication Number Publication Date
EP0427679A2 true EP0427679A2 (fr) 1991-05-15
EP0427679A3 EP0427679A3 (fr) 1991-07-24
EP0427679B1 EP0427679B1 (fr) 1994-06-15

Family

ID=5613578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810848A Expired - Lifetime EP0427679B1 (fr) 1989-11-06 1990-11-06 Dispositif de fractionnement de matières granuleuses

Country Status (4)

Country Link
EP (1) EP0427679B1 (fr)
AT (1) ATE107197T1 (fr)
DD (1) DD288762A5 (fr)
DE (1) DE59006134D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997014513A1 (fr) * 1995-10-19 1997-04-24 Ocrim S.P.A. Dispositif et appareil de tri et de separation de particules dans un procede de broyage de cereales
EP2042244A2 (fr) * 2007-09-25 2009-04-01 Michael Meserle Procédé et dispositif destinés à supprimer des poussières et/ou des impuretés en forme de fibres d'un granulé de matière synthétique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4426502C2 (de) * 1994-07-27 1996-08-01 Noell Abfall & Energietech Schwingherd
CN105214956B (zh) * 2015-10-28 2017-06-30 中国矿业大学 一种浓相气固流化床干法分选系统及工艺
CN109772703A (zh) * 2018-12-25 2019-05-21 泰州市长江食品有限公司 一种环保高效除杂筛选芝麻原料系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678131A (en) * 1950-07-17 1954-05-11 Robert F Dore Dry concentrator
CH547667A (de) * 1971-10-22 1974-04-11 Buehler Ag Geb Verfahren und vorrichtung zum anreichern durch sortieren und von angereicherten fraktionen koernigen gutes.
EP0162014A1 (fr) * 1984-05-08 1985-11-21 Bühler AG Dispositif et procédé de séparation de matières granuleuses
WO1988004204A1 (fr) * 1986-12-01 1988-06-16 Gebrüder Bühler Ag Installation et procede pour la preparation par voie seche a la mouture de produits alimentaires et fourragers en grains.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678131A (en) * 1950-07-17 1954-05-11 Robert F Dore Dry concentrator
CH547667A (de) * 1971-10-22 1974-04-11 Buehler Ag Geb Verfahren und vorrichtung zum anreichern durch sortieren und von angereicherten fraktionen koernigen gutes.
EP0162014A1 (fr) * 1984-05-08 1985-11-21 Bühler AG Dispositif et procédé de séparation de matières granuleuses
WO1988004204A1 (fr) * 1986-12-01 1988-06-16 Gebrüder Bühler Ag Installation et procede pour la preparation par voie seche a la mouture de produits alimentaires et fourragers en grains.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997014513A1 (fr) * 1995-10-19 1997-04-24 Ocrim S.P.A. Dispositif et appareil de tri et de separation de particules dans un procede de broyage de cereales
EP2042244A2 (fr) * 2007-09-25 2009-04-01 Michael Meserle Procédé et dispositif destinés à supprimer des poussières et/ou des impuretés en forme de fibres d'un granulé de matière synthétique
EP2042244A3 (fr) * 2007-09-25 2011-03-23 Michael Meserle Procédé et dispositif destinés à supprimer des poussières et/ou des impuretés en forme de fibres d'un granulé de matière synthétique

Also Published As

Publication number Publication date
EP0427679A3 (fr) 1991-07-24
ATE107197T1 (de) 1994-07-15
DD288762A5 (de) 1991-04-11
DE59006134D1 (de) 1994-07-21
EP0427679B1 (fr) 1994-06-15

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