EP1398086B1 - Trieur de particules - Google Patents

Trieur de particules Download PDF

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Publication number
EP1398086B1
EP1398086B1 EP02020347A EP02020347A EP1398086B1 EP 1398086 B1 EP1398086 B1 EP 1398086B1 EP 02020347 A EP02020347 A EP 02020347A EP 02020347 A EP02020347 A EP 02020347A EP 1398086 B1 EP1398086 B1 EP 1398086B1
Authority
EP
European Patent Office
Prior art keywords
wheels
separating
particle classifier
top part
particles
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
EP02020347A
Other languages
German (de)
English (en)
Other versions
EP1398086A1 (fr
Inventor
Felice Sommariva
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.)
Ehinger Impianti Srl
Original Assignee
Ehinger Impianti Srl
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 Ehinger Impianti Srl filed Critical Ehinger Impianti Srl
Priority to ES02020347T priority Critical patent/ES2282353T3/es
Priority to AT02020347T priority patent/ATE353715T1/de
Priority to DE60218156T priority patent/DE60218156T2/de
Priority to EP02020347A priority patent/EP1398086B1/fr
Publication of EP1398086A1 publication Critical patent/EP1398086A1/fr
Application granted granted Critical
Publication of EP1398086B1 publication Critical patent/EP1398086B1/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
    • 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
    • B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes

Definitions

  • the present invention relates to a particle classifier for separating fine material solids from coarser particles, both being dispersed in an air flow.
  • the material to be separated is dispersed in an air flow admitted into a separation chamber where - under the action of a rotor (separating wheel) - the coarse material is rejected by the centrifugal action of the wheel and drops by gravity to the bottom of the separation chamber, whereas the finer particles pass through the separating wheel and are ejected from the top section of the classifier.
  • the separating wheel is housed within a separation chamber and comprises a wheel formed with a plurality of evenly-spaced blades, arranged in the form of a blade ring with the blades extending parallel to the axis of rotation of the wheel or along a generatrix of a cone the axis of which coincides with the axis of rotation of the separating wheel.
  • the bottom of the separation chamber is connected to an outlet funnel for collecting and discharging the coarse particles falling downwards, while the top of the separation chamber is connected to a discharge pipe line through which the fine particles are sucked by a fan and sent to a device for separating the fine particles from the air current.
  • the capability of separating very fine particle resides in the centrifugal force applied by the wheel to the flow of material to be separated, and is therefore directly dependent upon the peripheral speed of the wheel and inversely dependent upon the wheel diameter.
  • EP-A-0 115 057 discloses a particle classifier comprising a single classification chamber with a vertical axis, having a top part and a bottom part coaxial to each other, said top part housing a number of separating wheels mounted for rotation about axes lying in a plane at right angle to the axis of said classification chamber.
  • This construction has the drawback of generating interferences and turbulences in the flows created by the wheels, which substantially increase the power consumption and impair the effectiveness of particles classification. Indeed it happened that, with an equal selection value, this solutions requires higher speed compared to the speed required by smaller classifiers, with consequent increase of erosion of rotor parts in contact with the material, and of mechanical stress, and a very high power consumption, which cannot be admitted in low commercial value products.
  • DE-A-19651876 also discloses a particle classifier having a single chamber housing a number of separating wheels.
  • the object of the present invention is to overcame the drawbacks of the prior art devices, by providing a particle classifier adapted to separate very fine particles in large flow of the material, with a smooth operation, a low erosion value and a low power consumption.
  • the classifying process happens independently in each chamber, thus allowing, compared to the absence of chambers, a reduction of erosion of those rotor parts in contact with the material, and a remarkable energy saving.
  • the invention allows-compared to the use of different small dimensioned classifiers - an increase of production capacity, even though we keep the option of producing even different selection values, one for each chamber.
  • the separator comprises a chamber 12 formed as a casing with a funnel-shaped top part 1 reducing the overall dimension of the apparatus and a cylindrical bottom part 10, both parts having the same vertical axis.
  • the funnel-shaped top part 1 contains three evenly spaced funnel-shaped independent separation chambers 2 disposed around such axis.
  • Each chamber 2 has its axis parallel to that of the classifier, i.e. vertical, and houses a separating assembly including a separating wheel 3 mounted for rotation about a shaft 4 in support members or bearings 5 located outside the classification chamber, with all said axes being parallel to the axis of said classification chamber.
  • Each of the separating wheels 3 comprises a plurality of blades located along the generatrix of a cone the axis of which coincides with the axis of rotation of the wheel, said blades being evenly spaced to one another and radially or obliquely oriented.
  • each separation chamber 2 is connected, preferably but not necessarily, to a central outlet discharge 7 through ducts 6, while the bottom part is in communication with a single feeding duct 9, preferably through three ducts 8 - each for each chamber - merging into the feeding duct 9.
  • the ducts 8 - when provided for - are substantially located in the cylindrically-shaped bottom part 10 of the casing 12 and an outlet funnel 11 is connected to the lower end of the cylindrical part and partially surrounds the duct 9 feeding the airflow with the dispersed particulate material.
  • the operation of the classifier according to the invention is the following.
  • a flow of air in which is dispersed the material to be separated (that is a mixture of particles having different sizes) is fed from the bottom upwards through the feeding duct 9 and divided into three flows having substantially the same flowrate that are conveyed through the ducts 8 into the separation chambers 2 where the flows are subjected to the separating action of the wheels 3.
  • the separation chambers 2 there are carried out autonomous processes for separating the finer particles from the coarser ones whereby the coarse particles are rejected from each wheels in a substantially independent manner thanks to the disposition of their axes, and gravity discharged through the cylindrical bottom part 10 into the outlet funnel 11.
  • the finer particles passing through the wheels 3 together with the dispersing air are sucked by means of a single fan not illustrated in the drawings, and sent to a further air-dust separating device of known type.
  • each separating assembly is actuated independently from the other, for example with each wheel 2 being driven by a separate motor so that each assembly can be operated independently from the other.
  • This working modality is useful, for example, to check possible unbalances in the rotors, as well as the proper mechanical operation of each separating assembly.
  • motors that are separately operable, and in case at different speeds, it is possible to obtain different types of separation of the fine particles for each separation chamber.
  • the invention allows for the separation of fine particles through an apparatus having reduced overall size and a performance similar or higher to the performance that can be obtained by using small particle classifiers, but with the advantage of conveying the airflows containing the finer particles into a single outlet discharge duct, provided with a single suction system, and of collecting the coarser particles from a single outlet funnel.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Claims (9)

  1. Trieur de particules comprenant un boîtier (12) avec un axe vertical, ayant une partie supérieure (1) et une partie inférieure (10) coaxiales l'une à l'autre, ladite partie supérieure logeant un certain nombre de roues de séparation (3) espacées de manière régulière autour dudit axe vertical pour séparer les particules plus fines dans un mélange de particules dispersé dans un courant d'air dirigé vers lesdites roues de séparation (3), caractérisé en ce que chacune desdites roues (3) est logée au sein d'une chambre de séparation indépendante respective (2) agencée dans ladite partie supérieure (1) du boîtier (12).
  2. Trieur de particules selon la revendication 1, caractérisé en ce que les axes desdites roues de séparation (3) sont parallèles à l'axe vertical de la machine.
  3. Trieur de particules selon la revendication 1, caractérisé en ce que ladite partie supérieure (1) logeant les roues de séparation (3) est en forme d'entonnoir et en ce que chacune desdites roues de séparation (3) est contenue dans une chambre de séparation (2) en forme d'entonnoir.
  4. Trieur de particules selon la revendication 1, caractérisé en ce que ladite partie supérieure (1) logeant les roues de séparation (3) est cylindrique et en ce que chacune des roues de séparation (3) est contenue dans une chambre de séparation (2) cylindrique.
  5. Trieur de particules selon la revendication 1, caractérisé en ce que lesdites roues (3) sont montées pour une rotation autour d'arbres (4) dans des organes de support ou des supports (5) situés à l'extérieur desdites chambres de séparation (2).
  6. Trieur de particules selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit courant d'air dans lequel un mélange de particules est dispersé est alimenté par une conduite d'alimentation unique (9) en communication avec la partie inférieure dudit boîtier (12).
  7. Trieur de particules selon la revendication 6, caractérisé en ce que ladite conduite d'alimentation (9) communique avec ladite chambre de séparation (2) par des conduites séparées (8) se rejoignant dans ladite conduite d'alimentation (9).
  8. Trieur de particules selon l'une quelconque des revendications précédentes, caractérisé en ce que chacune desdites roues (3) est entrainée indépendamment de l'autre.
  9. Trieur de particules selon la revendication 1, caractérisé en ce qu'il comprend une conduite d'évacuation de sortie centrale (7) destinée à collecter lesdites particules fines.
EP02020347A 2002-09-12 2002-09-12 Trieur de particules Expired - Lifetime EP1398086B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES02020347T ES2282353T3 (es) 2002-09-12 2002-09-12 Clasificador de particulas.
AT02020347T ATE353715T1 (de) 2002-09-12 2002-09-12 Partikelsortierer
DE60218156T DE60218156T2 (de) 2002-09-12 2002-09-12 Partikelsortierer
EP02020347A EP1398086B1 (fr) 2002-09-12 2002-09-12 Trieur de particules

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02020347A EP1398086B1 (fr) 2002-09-12 2002-09-12 Trieur de particules

Publications (2)

Publication Number Publication Date
EP1398086A1 EP1398086A1 (fr) 2004-03-17
EP1398086B1 true EP1398086B1 (fr) 2007-02-14

Family

ID=31725399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02020347A Expired - Lifetime EP1398086B1 (fr) 2002-09-12 2002-09-12 Trieur de particules

Country Status (4)

Country Link
EP (1) EP1398086B1 (fr)
AT (1) ATE353715T1 (fr)
DE (1) DE60218156T2 (fr)
ES (1) ES2282353T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005001542B4 (de) * 2005-01-13 2009-06-10 Lehigh Technologies, LLC, Naples Mehrrad-Windsichter, separate Sichterradeinheit und separate Sichterkammereinheit
CN109351458B (zh) * 2018-11-30 2024-05-31 福建龙亿粉体装备制造有限公司 一种具有多分级单元的立式粉碎机
CN109351459B (zh) * 2018-11-30 2024-05-31 福建龙亿粉体装备制造有限公司 一种具有多分级单元的立式粉体分级机构及分级装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3303078C1 (de) * 1983-01-29 1984-05-30 Alpine Ag, 8900 Augsburg Windsichter fuer den Feinstbereich
DE3814458A1 (de) * 1988-04-28 1989-11-09 Krupp Polysius Ag Windsichter
JPH05253506A (ja) * 1992-03-13 1993-10-05 Ishikawajima Harima Heavy Ind Co Ltd 竪型粉砕装置
DE19651876C2 (de) * 1996-12-13 2000-07-27 Alstom Energy Syst Gmbh Sichteinrichtung

Also Published As

Publication number Publication date
DE60218156D1 (de) 2007-03-29
DE60218156T2 (de) 2007-11-15
EP1398086A1 (fr) 2004-03-17
ATE353715T1 (de) 2007-03-15
ES2282353T3 (es) 2007-10-16

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