EP1086753A1 - Windsichter - Google Patents
Windsichter Download PDFInfo
- Publication number
- EP1086753A1 EP1086753A1 EP00116372A EP00116372A EP1086753A1 EP 1086753 A1 EP1086753 A1 EP 1086753A1 EP 00116372 A EP00116372 A EP 00116372A EP 00116372 A EP00116372 A EP 00116372A EP 1086753 A1 EP1086753 A1 EP 1086753A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- expansion housing
- air
- cover plate
- classifying
- air classifier
- 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
Links
Images
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
-
- 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
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
Definitions
- the invention relates to an air classifier according to the preamble of claim 1.
- bucket wheel classifiers Classifiers In such, usually referred to as bucket wheel classifiers Classifiers, flows through the fine air loaded with fine material the bladed rotor, i.e. the classifying wheel, from the outside inside and leaves through a central discharge opening in the corresponding front wall.
- the separation limit depends on the speed of the rotor and the volume flow of the penetrated Gases off. The higher the speed and the lower the gas flow, the finer the cut.
- Such air classifiers have such fine classifications considerable pressure drops and thus a high specific one Energy requirement because, as I said, high rotor speeds required are.
- the rotors are small Discharge openings (approx. 0.5 x rotor diameter) because with the same speed and the same gas volume flow smaller diameter of the discharge opening a finer Parting cut can be achieved. This is an advantage if for mechanical reasons the rotor speed is not further increased or for procedural reasons the The amount of gas cannot be reduced. The smaller the diameter the discharge opening is selected, the higher - depending on the rotor speed - the air or gas speed and with it the pressure loss, if there is this speed energy does not succeed again partially recover as pressure energy.
- the invention is based on the object of an air classifier to create of the type mentioned, in which also In the case of fine sightings, the lowest possible pressure losses occur.
- part of the wall of the expansion housing is formed by the corresponding adjacent end wall, ie the cover disk of the classifying wheel, which therefore rotates with the classifying wheel.
- a corresponding opening is provided in the stationary wall of the expansion housing, in which the rotating cover plate lies with the discharge opening.
- the annular gap between these two parts rotating relative to one another is supplied with purge air in order to counteract a short circuit between the visible space and the expansion housing.
- the pneumatic seal is advantageously designed as specified in claim 2.
- the expansion housing is designed in a manner known per se as stated in claim 4.
- This air classifier consists of a visual space 7, in which the Sight wheel 1 protrudes and by a motor, not shown is driven, the thyristor-controlled continuously variable speed is.
- the upper end wall of the classifying wheel 1 is a cover plate 5 formed with a central discharge opening 2.
- This Cover plate 5 lies in an opening of the upper wall 8 of the Visible space 7. Between the circumferential cover plate 5 and the wall 8 remains an annular gap, that of a nozzle 9 purge air is supplied.
- the wall is 8 double-walled.
- the expansion housing 3 On top of wall 8, i.e. on the side of the wall 8 which faces away from the viewing space 7 is the expansion housing 3, which as a spiral housing with outlet channel 4 is formed, which is substantially perpendicular to the axis of rotation the classifying wheel 1 is arranged.
- the Cover disc 5 On top of the Cover disc 5 are in the expansion housing 3 fan blades 10, the gas flow additional kinetic Supply energy.
- Air L with feed material A is located in the viewing space 7, which enters the sight wheel 1 from the outside inwards. From the air outlet L 4 is with fine material F loaded. The purge air that enters the nozzle 9 is marked with S. The coarse material G leaves the viewing space 7 a discharge opening, not shown, in the lower part.
Landscapes
- Combined Means For Separation Of Solids (AREA)
- Separation Of Gases By Adsorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Claims (6)
- Windsichter mit einem entgegen der Fliehkraft radial von außen nach innen von der feingutbeladenen Sichtluft durchströmten, in einer Sichtkammer (7) rotierenden Sichtrad (1), aus dem die Sichtluft axial durch eine Austragsöffnung (2) in einer Deckscheibe (5) in ein Expansiongehäuse (3) abströmt, dadurch gekennzeichnet, daß die Deckscheibe (5) mit ihrer Austragsöffnung (2) gleichzeitig die angrenzende Wand (8) des Expansionsgehäuses (3) bildet, daß
in den Ringspalt (6) zwischen der Wand (8) des Expansionsgehäuses (3) und der Deckscheibe (5) Spülluft eingeblasen wird. - Windsichter nach Anspruch 1, dadurch gekennzeichnet, daß die Wand (8) des Expansionsgehäuses (3) doppelwandig zum Einblasen der Spülluft ausgebildet ist.
- Windsichter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Austrittskanal (4) des Expansionsgehäuses (3) im wesentlichen senkrecht der Drehachse des Sichtrades (1) verläuft.
- Windsichter nach Anspruch 3, dadurch gekennzeichnet, daß das Expansionsgehäuse (3) als Spiralgehäuse ausgebildet ist.
- Windsichter nach Anspruch 4, dadurch gekennzeichnet, daß der größte Radius des Spiralgehäuses ungefähr das zweifache des Radius der Deckscheibe (5) des Sichtrades (1) beträgt.
- Windsichter nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß auf der Deckscheibe (5) des Sichtrades (1) in dem Expansionsgehäuse (3) Ventilatorflügel (10) vorgesehen sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19947862A DE19947862A1 (de) | 1999-09-23 | 1999-09-23 | Windsichter |
DE19947862 | 1999-09-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1086753A1 true EP1086753A1 (de) | 2001-03-28 |
EP1086753B1 EP1086753B1 (de) | 2004-11-10 |
Family
ID=7924507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00116372A Expired - Lifetime EP1086753B1 (de) | 1999-09-23 | 2000-07-28 | Windsichter |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1086753B1 (de) |
AT (1) | ATE281894T1 (de) |
DE (2) | DE19947862A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2936171A1 (fr) * | 2008-09-19 | 2010-03-26 | Broyeurs Poittemill Ingenierie | Selecteur de particules a flux d'air avec etancheite renforcee |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008038776B4 (de) * | 2008-08-12 | 2016-07-07 | Loesche Gmbh | Verfahren zur Sichtung eines Mahlgut-Fluid-Gemisches und Mühlensichter |
CN109201483A (zh) * | 2017-06-30 | 2019-01-15 | 四川丰能粉体设备有限公司 | 一种新型气流粉碎分级机 |
DE102017120033B4 (de) | 2017-08-31 | 2024-02-08 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Vorrichtung zur Abtrennung und/oder Gewinnung von Silikatpartikeln aus pflanzlichem Material |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2269412A (en) * | 1940-07-18 | 1942-01-06 | Sturtevant Mill Co | Air separator |
DE19505466A1 (de) * | 1995-02-17 | 1996-08-22 | Krupp Polysius Ag | Windsichter |
EP0734787A1 (de) * | 1995-03-28 | 1996-10-02 | OMYA GmbH | Zentrifugalkraftsichter, Lagerung der Rotorwelle |
WO1996031294A1 (en) * | 1995-04-07 | 1996-10-10 | Sinvent A/S | Apparatus for classification of particulate material |
-
1999
- 1999-09-23 DE DE19947862A patent/DE19947862A1/de not_active Withdrawn
-
2000
- 2000-07-28 DE DE50008577T patent/DE50008577D1/de not_active Expired - Lifetime
- 2000-07-28 EP EP00116372A patent/EP1086753B1/de not_active Expired - Lifetime
- 2000-07-28 AT AT00116372T patent/ATE281894T1/de active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2269412A (en) * | 1940-07-18 | 1942-01-06 | Sturtevant Mill Co | Air separator |
DE19505466A1 (de) * | 1995-02-17 | 1996-08-22 | Krupp Polysius Ag | Windsichter |
EP0734787A1 (de) * | 1995-03-28 | 1996-10-02 | OMYA GmbH | Zentrifugalkraftsichter, Lagerung der Rotorwelle |
WO1996031294A1 (en) * | 1995-04-07 | 1996-10-10 | Sinvent A/S | Apparatus for classification of particulate material |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2936171A1 (fr) * | 2008-09-19 | 2010-03-26 | Broyeurs Poittemill Ingenierie | Selecteur de particules a flux d'air avec etancheite renforcee |
Also Published As
Publication number | Publication date |
---|---|
EP1086753B1 (de) | 2004-11-10 |
ATE281894T1 (de) | 2004-11-15 |
DE19947862A1 (de) | 2001-03-29 |
DE50008577D1 (de) | 2004-12-16 |
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