EP0534483B1 - Turbo-Fliehkraftsichter - Google Patents
Turbo-Fliehkraftsichter Download PDFInfo
- Publication number
- EP0534483B1 EP0534483B1 EP92116543A EP92116543A EP0534483B1 EP 0534483 B1 EP0534483 B1 EP 0534483B1 EP 92116543 A EP92116543 A EP 92116543A EP 92116543 A EP92116543 A EP 92116543A EP 0534483 B1 EP0534483 B1 EP 0534483B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- classifier
- turbo
- wheel
- fine material
- centrifugal
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
-
- 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 invention relates to a turbo centrifugal classifier accordingly the preamble of claim 1.
- an air classifier which has an inlet for viewing material, a Visual air inlet, at least one fine material-visual air mixture outlet and at least has a coarse material outlet. It is supported by one at both ends Provide the classifier wheel with a horizontal classifier wheel axis, with an additional one Vane ring delimiting visual space is arranged, the blades of which are in tangential flow direction to the classifier wheel circumference are adjustable and the determines the direction of flow of the classifying air.
- This blade ring is in one Circular sector for the removal of the coarse material and has an in coarse material cutting arranged in this circular sector. The removal of the fine material / visual air mixture takes place axially over the end faces of the classifier wheel. That too classifying material is placed outside the blade ring in the classifier housing brought in.
- the invention has for its object the turbo centrifugal classifier in terms of operating frequencies and in terms of improve the diameter-length ratio and at the same time the quality of the separation process to increase.
- the fine material / visual air mixture is adjusted accordingly large sections of the classifier wheel with the for View necessary radial speed from the outside sucked inside and on correspondingly short lengths the classifier wheel with a much higher z. B. 3-6 times radial speed sucked inside out.
- the arrangement of the sections has changed Suction and extraction on the classifier wheel jacket for the fine material / mixed air mixture according to the present invention the advantage that the pressure drop generated by the classifier wheel, which overcome by an external blower would have to be quashed, except for slight pressure drops becomes. Because this pressure drop for sifting at high Fineness is not insignificantly high and accordingly large, e.g. T. two-tier arranged one behind the other Blower and consequently correspondingly pressure-resistant air routing and filter devices would be necessary these in the present invention z. T. omitted, or essential be simplified.
- Figure 1 shows a known grinding-visual cycle with a Turboflash force classifier with a classifier wheel 1 e.g. B. for grinding cement, des is acted upon by a ball mill 2 '.
- the feed 9 ' can be regulated from a silo 4' via a cell lock 3 ' the ball mill 2 'supplied after grinding in the ball mill 2 'becomes the ball mill material 13' via a bucket elevator 11 'and a screw 6' with the exclusion of air by means of a Cell lock 3 'placed on the turbo centrifugal classifier.
- the length of the turbo centrifugal classifier is carried out by a feed channel 10 '.
- the classifying wheel 1 driven by a motor 7 ′ of the turbo centrifugal separator separates the spherical waste 13 'in coarse material 12' and fine material 17 'by means of the externally supplied Sight air 14 ', which is also the dedusting the ball mill 2 'can take over.
- the coarse material 12 ' falls down into a screw conveyor 6 'and passes under the exclusion of air by means of a cell lock 3 'back to the task the ball mill 2.
- the fine material 17 ' is together with the Sight air 14 'through the classifier wheel 1 of the turbo centrifugal classifier 1 suctioned off and fed cyclone separators 5 '.
- a large Portion of fine material 17 ' is separated off there and by means of cell locks 3 'carried out.
- FIGS 2 to 4 show different embodiments of the classifier wheel.
- Figure 2 shows a double-sided classifying wheel 1 with a Diameter-length ratio D / L of approx. 1: 1.
- the bigger one used for sighting, flowed from the outside inwards Length section 2 is by a seal 3 on the circumference the classifier wheel 1 from the smaller one, for extracting the fine air / air mixture 4 used, flowed through from the inside to the outside Length section 5 separately.
- a visual space 6 is located yourself over the larger length section 2 and a Ventilation room 7, which is used to extract the fine air / air mixture 4 serves, is located above the shorter length section 5, which is also used as a fan with ventilation blades 8 of the same or larger diameter than it could be in the field of vision.
- Figure 3 shows a double-sided classifying wheel 9 with a Diameter-length ratio D / L of approx. 1: 2. At this Arrangement there are two larger length sections 2 for sifting, which the fine air mixture 4 in a common to Suction provided length section 5 in the ventilation room Submit 7. Through two seals 3 on the circumference of the Classifier wheel 9 are classroom 6 and valve room 7 from each other Cut. Camp 10 is on both End faces of the classifier wheel 9. The classifier wheel 9 is driven by a motor 11 driven.
- FIG. 4 shows a classifying wheel 12 mounted on two sides a diameter / length ratio D / L of approx. 1: 4.
- This Classifier wheel is provided with two common, for suction Long sections 5 provided, each of larger, for Sighting sections 2 and 13 with fine air mixture 4 are fed, the middle length section 13 is approximately twice as large as a length segment 2.
- the drive of the two-sided in bearings 10 Classifier wheel 12 in this case takes place by two motors 11, which are connected to the classifying wheel 12 with couplings, like the classifying wheels 1 and 9 with the motors 11.
- sifter wheels can be used as in one Modular principle to be built and to one, the strength of the classifier wheel corresponding to any length a diameter / length ratio D / L of up to 1: 6 or Can be extended 1: 8.
- FIG. 5 shows a longitudinal section A-B in FIGS. 6 and 7, Cross sections C-D and E-F in Fig. 5 of a turbo centrifugal classifier. It is a sifter with a diameter / length ratio D / L of approx. 1: 2.
- the Classifier wheel 1 is one-sided via a shaft driven. Storage takes place on both sides in the Bearings 10, which are built on a lower housing part.
- the classifier wheel 1 has two classrooms 6 for the intake and a ventilation room 7 for the extraction of the fine material-visual air mixture.
- the classifier wheel blades have 6 and 6 in all rooms 7 same diameter. Located between rooms 6 and 7 themselves two seals 3, which prevent unsighted Feed material in the fine material classifying air space can reach.
- the upper housing part which is the focus the classifier wheel 1 is separated from the lower housing part, has a visible material inlet 14.
- Two double-sided air conveying troughs 15 distribute the feed in several on the Length of classifier wheel 1 attached tangentially in the direction of rotation Feed hopper 16, which ensure that the feed material evenly along the length of the classifier wheel 1 in the range of Visible space 6 is distributed.
- the intake of the visual air 17 takes place via a suction opening 18 in the lower housing part and is arranged on the circumference of the classifying wheel 1
- Air guide vanes 19 passed through such that the Visible air 17 tangentially on the classifier wheel 1 and that in inner circle of air guide vanes 19 fed feed tears with it and in a circular motion offset in the direction of rotation of the classifier wheel 1.
- Both the suction opening 18 for the Intake of the visual air 17, as well as the suction nozzle 22 for the extraction of the fine material-air mixture be rotated by 90 ° around the classifier wheel axis by one favorable arrangement to be found in an overall system.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
- Centrifugal Separators (AREA)
Description
- dF =
- Feingutdurchmesser
- vR =
- Radialgeschwindigkeit
- vU =
- Umfangsgeschwindigkeit
- DT =
- Sichterraddurchmesser
- γL =
- Luftdichte
- η =
- Luftzähigkeit
- γG =
- Sichtgutdichte
- größere aktive Sichterradoberfläche
- Aufhebung des Druckgefälles
- einfache und konventionelle Anordnung von Lagerung und Regelantrieben
- Fig. 1
- eine schematische Darstellung eines bekannten Turbo-Fliehkraftsichters mit zugehörigem Mahl-Sichtkreislauf,
- Fig. 2 - 4
- Axialschnitte verschiedener Sichter gemäß der Erfindung,
- Fig. 5
- einen Schnitt längs der Linie A-B in Fig. 6 und 7,
- Fig. 6
- einen Schnitt längs der Linie C-D in Fig 5 und
- Fig. 7
- einen Schnitt längs der Linie E-F in Fig. 5.
Claims (13)
- Turbo-Fliehkraftlichter mit einem feststehenden Gehäuse, versehen mit einem oder mehreren Sichtguteinlässen (14), mit einem oder mehreren Sichtlufteinlässen (18), mit einem oder mehreren Feingut-Sichtluft-Gemisch-Auslässen (22) und einem oder mehreren Grobgut-Auslässen (28), versehen mit einem an seinen beiden Enden gelagerten Sichterrad (1, 9, 12) mit horizontaler Sichterradachse, sowie einem den Sichtraum begrenzenden, der Sichtluft richtungsgebenden Schaufelkranz mit in tangentialer Anströmrichtung zum Sichterradumfang verstellbaren Schaufeln (19), die in einem Sektor für die Abführung des Grobgutes durchbrochen sind,
dadurch gekennzeichnet, daßdie Schaufeln (19) des Schaufelkranzes in radialer Entfernung zur Sichterradachse verstellbar sind,in dem Sektor wenigstens ein Aufgabetrichter (16) zur Zufuhr des Sichtgutes innerhalb des Schaufelkranzes vorgesehen ist,daß das Sichterrad (1, 9, 12) sowohl als Sichter als auch als Arbeitsventilator ausgebildet ist, und daß zum Sichten des Feingutes das Sichterrad (1, 9, 12) in wenigstens einem ersten Längenabschnitt (2) mit Sichtluft und Feingut von außen nach innen mit entsprechend kleiner Radialgeschwindigkeit und in wenigstens einem zweiten Längenabschnitt (5) zum Abführen von Sichtluft und Feingut von innen nach außen mit einer mehrfach größeren Radialgeschwindigkeit durchströmt wird. - Turbo-Fliehkraftsichter nach Anspruch 1,
dadurch gekennzeichnet, daß das Sichterrad (1, 9, 12) relativ kurze zweite Längenabschnitte (5) zum Abführen von Sichtluft und Feingut an einer oder mehreren Stellen, vorzugsweise mittig, zwischen zwei längeren ersten Längenabschnitten (2) zum Zuführen von Sichtluft und Feingut, aufweist. - Turbo-Fliehkraftsichter nach Anspruch 2,
dadurch gekennzeichnet, daß
der Durchmesser des Sichterrades in den Längenabschnitten (2, 5) zur Zu- und Abfuhr des Feingut-Sichtluft-Gemisches unterschiedlich groß ist. - Turbo-Fliehkraftsichter nach Anspruch 2 oder 3,
dadurch gekennzeichnet, daß
die ralativ kurzen zweiten Längenabschnitte (5) zum Abführen des Feingut-Sichtluft-Gemisches als Ventilator (8) ausgebildet sind. - Turbo-Fliehkraftsichter nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, daß
zwischen den Längenabschnitten (2, 5) zur Zu- und Abfuhr des Feingut-Sichtluft-Gemisches Dichtungen (3) am Umfang des Sichterrader angebracht sind. - Turbo-Fliehkraftsichter nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet, daß
das Durchmesser-Längen-Verhältnis in den ersten Längenabschnitten (2) der Zufuhr des Feingut-Sichtluft-Gemisches ein Verhältnis von 1:1 oder größer ist. - Turbo-Fliehkraftsichter nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß
bei größeren Sichtereinheiten das Sichterrad zweiseitig angetrieben wird. - Turbo-Fliehkraftsichter nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß
der Antrieb des Sichterrades regelbar ist. - Turbo-Fliehkraftsichter nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß
in den ersten Längenabschnitten (2) der Zu- und Ablauf von Aufgabe- und Grobgut in einem oder mehreren Schaufelsektoren so angeordnet sind, daß abwechselnd Aufgabegut dem Sichterrad tangential zugeführt und Grobgut tangential vom Sichterrad weggeführt wird. - Turbo-Fliehkraftsichter nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, daß
die Zufuhr des Aufgabegutes pneumatisch erfolgt. - Turbo-Fliehkraftsichter nach Anspruch 10,
dadurch gekennzeichnet, daß
das Aufgabegut vor der Zufuhr vorher dispergiert wird. - Turbo-Fliehkraftsichter nach einem der Ansprüche 2 bis 11,
dadurch gekennzeichnet, daß
mehrere Zu- und Abführeinrichtungen über die Sichterradlänge verteilt sind, um diese gleichmäßig zu beaufschlagen. - Turbo-Fliehkraftsichter nach einem der Ansprüche 1 bis 12,
dadurch gekennzeichnet, daß
die Radialgeschwindigkeit zum Abführen des Feingut-Sichtluft-Gemisches 3 bis 6 mal größer ist, als die Radialgeschwindigkeit zum Zuführen des Feingut-Sichtluft-Gemisches.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4132339 | 1991-09-27 | ||
DE4132339A DE4132339C2 (de) | 1991-09-27 | 1991-09-27 | Turbo-Fliehkraftsichter |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0534483A2 EP0534483A2 (de) | 1993-03-31 |
EP0534483A3 EP0534483A3 (en) | 1994-10-26 |
EP0534483B1 true EP0534483B1 (de) | 1998-03-25 |
Family
ID=6441694
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92116543A Expired - Lifetime EP0534483B1 (de) | 1991-09-27 | 1992-09-28 | Turbo-Fliehkraftsichter |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0534483B1 (de) |
AT (1) | ATE164331T1 (de) |
DE (2) | DE4132339C2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10350518A1 (de) * | 2003-10-29 | 2005-06-09 | Khd Humboldt Wedag Ag | Sichtereinrichtung zum Sichten von körnigem Gut |
DE102018132155B3 (de) * | 2018-12-13 | 2019-12-12 | Netzsch-Feinmahltechnik Gmbh | Fliehkraftsichter mit speziellem sichterrad |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3767045A (en) * | 1970-03-18 | 1973-10-23 | Siempelkamp Gmbh & Co | Closed circuit multi-stage air classifier |
DE3814458A1 (de) * | 1988-04-28 | 1989-11-09 | Krupp Polysius Ag | Windsichter |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE521082C (de) * | 1925-11-07 | 1931-03-16 | Hermann Hildebrandt | Sichter mit einem einem Geblaese vorgeschalteten Sichtrad |
US4409097A (en) * | 1981-10-16 | 1983-10-11 | Omya Gmbh | Improved pivotable centrifugal classifier and method of classifying |
DE3539512A1 (de) * | 1985-11-07 | 1987-05-14 | Krupp Polysius Ag | Sichter |
-
1991
- 1991-09-27 DE DE4132339A patent/DE4132339C2/de not_active Revoked
-
1992
- 1992-09-28 AT AT92116543T patent/ATE164331T1/de not_active IP Right Cessation
- 1992-09-28 EP EP92116543A patent/EP0534483B1/de not_active Expired - Lifetime
- 1992-09-28 DE DE59209249T patent/DE59209249D1/de not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3767045A (en) * | 1970-03-18 | 1973-10-23 | Siempelkamp Gmbh & Co | Closed circuit multi-stage air classifier |
DE3814458A1 (de) * | 1988-04-28 | 1989-11-09 | Krupp Polysius Ag | Windsichter |
Also Published As
Publication number | Publication date |
---|---|
DE59209249D1 (de) | 1998-04-30 |
DE4132339C2 (de) | 1993-12-02 |
EP0534483A3 (en) | 1994-10-26 |
ATE164331T1 (de) | 1998-04-15 |
DE4132339A1 (de) | 1993-04-08 |
EP0534483A2 (de) | 1993-03-31 |
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