DD248970A1 - centrifugal separator - Google Patents

centrifugal separator Download PDF

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Publication number
DD248970A1
DD248970A1 DD28582585A DD28582585A DD248970A1 DD 248970 A1 DD248970 A1 DD 248970A1 DD 28582585 A DD28582585 A DD 28582585A DD 28582585 A DD28582585 A DD 28582585A DD 248970 A1 DD248970 A1 DD 248970A1
Authority
DD
German Democratic Republic
Prior art keywords
wheel
arranged
dispersing
classifying
classifying wheel
Prior art date
Application number
DD28582585A
Other languages
German (de)
Inventor
Klaus Husemann
Roland Herrmann
Guenter Thomas
Wolfgang Scheibe
Claus Bernhardt
Winfried Raatz
Hartmut Verch
Johannes Uhlmann
Original Assignee
Akad Wissenschaften Ddr
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 Akad Wissenschaften Ddr filed Critical Akad Wissenschaften Ddr
Priority to DD28582585A priority Critical patent/DD248970A1/en
Publication of DD248970A1 publication Critical patent/DD248970A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, OR SIFTING OR BY USING GAS CURRENTS; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B07B7/083Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, OR SIFTING OR BY USING GAS CURRENTS; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/025Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall the material being slingered or fled out horizontally before falling, e.g. by dispersing elements

Abstract

The invention relates to a centrifugal air classifier. It provides an apparatus for continuous dry classification in the centrifugal field with prior dispersion and deagglomeration of fine-grained materials into a coarse and a fine fraction in an apparatus. The object of the invention is to provide an improved classification result, i. H. improved spreading of fines and / or higher Trennschaerfen bie low Trennkorngroessen, preferably less than 10mm to achieve. The centrifugal wind sifter according to the invention is characterized in that on the outside of the classifying wheel and on the task-side boundary wall of the dispersing wheel, pin, bar and / or paddle-shaped baffle, impact or dispersing elements are arranged in a circle and intermesh, the dispersing wheel is stationary and / or is arranged variably rotatable, on the application side immediately before the viewing space an additional blade ring is arranged, the Begrenzungswaende the deflection zone in the transition region from the radial in a direction which has an angle greater 0 to 120 to the radial direction, the smallest distance and the additional Rotate the blade ring and the boundary wall together with the display wheel. Fig. 1

Description

Title of the invention Centrifugal air classifier

Field of application of the invention

The invention relates to an apparatus for continuous dry classification in the centrifugal field with prior dispersing and deagglomerating fine-grained materials, preferably < 40 / um, into a coarse and fine fraction in an apparatus

 10

Characteristic of the known technical solutions Bs Zentrifugalwindsichter are known which have a flat-cylindrical, fixed housing (DE OS 1657122 and others), at the periphery of the viewing gas flows tangentially (DE PS 834319 and others), in which Materialzu- and Materialabführyorrichtungen (eg. Groggutabführung in DE OS 3418635) and a dispersing device for the Good to be classified: z. B. outside the classifier housing in DE OS 3418634; z. B. within the classifier housing by pins in DE PS 834319 or within the classifier housing by blades in DE PS 892266 and in DE AS 1482436.

In such Zentrifugalwindsichtern is also known that in the housing a counter to the spin direction of a viewing gas flowed through classifying wheel (DE OS 1657122, etc.) rotates, the visual goods and the classifying gas supplied v / ground and in which the coarse material leaves the classifying wheel outside the periphery while Peing and visual gas from an opening in the center of the Sichtrades emerge (DE I 1 S 892266 and others).

31DlZ 1985 * 3.1.1234

There are also known Zentrifugalwindsichter in which the viewing space within the rotating Sichtrades' consists of two arranged on the circumference of the classifying wheel blade rings with an annular space between them .besteht, in which the Sichtgut occurs (AT PS 281566 = DE AS 1732775; DE AS 2126552; DE OS 3321292), wherein the Sichtraumbreite is constant (DS OS 3321292 and others) or increases inwardly (DE PS 894803 or DE AS 2126552) and the blades of the classifying wheel in the radial direction (DE OS 1657122) or are arranged such that the blades the radial directions of the Klassierrades cut (DE OS 3321292). All known technical solutions have in common that, in particular for the fine and Feinstkornklassierung the dispersion and deagglomeration or pre-crushing and pre-acceleration are in need of improvement.

For example, the visible material is indeed accelerated in radial channels or similar devices in the direction of rotation of the classifying wheel, but strongly decelerated again by the stationary housing wall in front of the viewing zone. Furthermore, in the mechanical separators in the known classifiers, the shear forces and turbulences are too low to achieve a sufficient dispersing effect. In the case of the high linear speeds with which classifying wheels have to be operated in order to achieve a low separation grain size and / or high selectivity, in the case of insufficient material pre-acceleration and / or insufficient dispersion both partially only take place in the viewing zone. Known classifier mills, in which the material to be separated is purposefully crushed before the sighting, either do not use the kinetic energy of the classifying wheel or a variation of the stress rate is not possible independently of the speed of the classifying wheel. If the material to be inspected enters the viewing area at an angle to the classifying air, a deflection of the material stream from the radial direction is necessary. "This diversion is problematic in the known technical solutions and therefore in need of improvement.

31.üEZ.1S85 * Sil254

Object of the invention

Ss is the object of the invention, by an improved compared to the prior art apparative solution greater dispersion and deagglomeration or pre-crushing and pre-acceleration of the material immediately in front of the viewing zone and thus an improved Klassierergebnis, d. H. to achieve improved spreading at Peingut and / or higher separating powers at low separation grain sizes, preferably less than 10 / μm.

Explanation of the nature of the invention

The invention has for its object to develop an apparatus solution that allows on the basis of a continuous dry classification of fine-grained materials greater dispersion and deagglomeration or pre-crushing and acceleration of the visual material before entering the viewing zone and thus an improved Klassierergebnis , d. H. To achieve higher output at Peingut and / or higher separation sharpness at low separation grain sizes.

The task is based on a centrifugal air classifier with classifying wheel 2, in the u. a. two blade rings 3 and 4 and therebetween an annular viewing space 5 are arranged for the Sichtguteintritt, according to the invention solved in that task side on the outer side 6 of the classifying wheel 2 and on the output side outer boundary wall of the dispersing wheel 20 (Figure.1) pen, rod and / or paddle-shaped baffle, beating or dispersing 8 are arranged in a circle and interlock analogous to the arrangement in pin mills, the dispersing 20 is arranged fixed and / or variably rotatable in both directions of rotation, the task side immediately before the viewing space 5 another blade ring 9 is arranged is, wherein the blades are preferably formed as webs between slots and the boundary walls 10 of the Sichtgutzuführung after the dispersing zone in the Um-

steering zone 18 have the smallest distance and rotate with the classifying wheel 2.

Furthermore, it is characteristic that the blades of the outer blade ring 3 are formed in the classifying wheel 2 as elements with kreisaus- or kreisabschnittsförmigem cross section,. in the radial direction straight or at radial inner edge on the outer edge to 45 ° opposite to the direction of rotation inclined to the radial direction and are arranged at a distance to each other, which is at least twice the distance between the blades of the inner blade ring 4 in the classifying wheel 2. The material supply 17 through the housing 1 is designed as a tube 12 with adjustable distance to the classifying wheel 2 and between tube 12 and housing 1 there is a secondary air supply 13 · Between the housing 1 and the classifying wheel 2, the dispersing 20 and / or boundary wall 10 are co-rotating Fan blades 11 are arranged, which are preferably inclined in the direction of rotation and / or concave curved.

The classifying gas flows in tangential direction on the circumference of the housing 1 via the classifying air supply 15 and is fed radially to the rotary classifying wheel 2. The Sichtgut occurs on the Sichtgutzuführung 17 axially through the housing 1, is after passing through the circular arranged impact, Schlagbzw. Dispersing elements 8, which have a speed relative to each other (dispersing zone 19), deflected in the deflection zone 18 and enters the * Sichtraum 5 at an angle - 120 ° to the original radial direction. The coarse material is thrown against the view air flow to the outside and discharged at the periphery of the housing 1 via the coarse material discharge 16, while the fines together with the classifying air in the axis near the classifying wheel 2 and from there from the classifying wheel and classifier housing 1 via the fine material and Sichtluftabzugsvorrichtung 14th transported and separated from the classifying air in subsequent separation devices. The invention will be explained in more detail below with reference to an exemplary embodiment and FIG. Figure 1 shows the side view of the centrifugal air classifier as a schematic sectional drawing.

embodiment

The centrifugal air classifier (Pig. 1) consists essentially of a fixed housing 1, a supply pipe 12, a fixed exhaust device 14 for fine material and classifying air, and a rotating classifying wheel 2 and a rotatable diaper wheel 20.

The visual and sight air dosing devices, the sight, coarse and fines reservoirs, the separator for fines and air, the drives u. Ä. Are not shown for clarity in Fig. 1.

The housing 1 surrounds classifying wheel 2 and dispersing wheel 20 and is fixedly connected to the discharge device 14 for fines and classifying air and the tangential view air supply 15, the secondary air supply 13 and the coarse material discharge 16. The housing 1 is formed flat cylindrical on the circumference of the classifying wheel 2 and contains the bearings for the drive shafts of classifying wheel 21 and dispersing 22nd

The classifying wheel 2 is firmly connected to the drive shaft 21. Between the side walls of the classifying wheel 2, an inwardly widening flat-cylindrical space is formed. In this space are an outer and inner blade ring 3 and 4 and therebetween an annular viewing space 5, in the paraxial enters the Sichtgut and is exposed to the visual process as a result of centrifugal, flow and vortex fields. The flat blades of the inner blade ring 4 are arranged in the radial direction and at a small distance. The blades of the outer blade ring 3 have a circular cross-section, are at radial inner edge at the outer edge by 30 ° opposite to the direction of rotation inclined to the radial direction, their free distance is three times the distance between the blades of the inner blade ring 4th

On the outer side β of the classifying wheel 2, as on the delivery-side boundary wall 7 of the dispersing wheel 20, there are pin-shaped baffle, impact or dispersing elements 8 in a circular arrangement, wherein the pins 8 engage in one another analogously to the arrangement in pin mills. The dispersing wheel rotates in the same or in the reverse direction of rotation as the classifying wheel 2. As a result, in the latter case, they are in the dispersing zone

linear load speeds greater than the linear peripheral speed when entering the viewing space 5 can be realized.

The material to be viewed passes through the axial material feed 17 into the dispersing zone 19, is dispersed here and comminuted depending on the relative speed between viewing and Dispergierrad 2 and 20 and then deflected in the deflection 18 in the axis-parallel lease before it enters the viewing space. The outermost pin circle of the dispersing zone 19, the boundary walls 10 and the blade ring 9 are fixedly connected to the classifying wheel 2 and thus rotate with it. "The boundary walls 10 have the smallest distance at the transition from the radial to the axially parallel direction.

Between the housing 1 and the rotating elements of the classifying wheel 2, the dispersing wheel 20 and the boundary wall 10, fan blades 11 which are inclined in the direction of rotation are attached to the rotating parts.

 The centrifugal air classifier according to the invention is preferably suitable for classifying tasks in the finest and finest particle size range and in which a pretreatment in the sense of deagglomerating, dispersing and / or pre-accelerating is expedient. In addition, the centrifugal air classifier according to the invention can be operated with a pretreatment stage and by recycling the coarse material into the feed material as a classifier mill.

Claims (6)

  1. invention claim
    1. Centrifugal viscometer for separating a visual good, preferably smaller than 40 / um, into a coarse and a fine fraction ; with a flat-cylindrical, stationary housing (1),
    • At the periphery of the sighting gas flows tangentially, in which Haterialzu- and -abführungsvorrichtungen and a dispersing device and in which a counter to the spin direction of a classifying gas durchströ'mtes classifying wheel (2) rotates, the Sichtgut and the classifying gas are supplied and at in which the coarse material leaves the classifying wheel on the outside of the circumference and in which the sighting gas and the peening emerge from an opening in the center of the classifying wheel, the viewing space within the classifying wheel consists of two blade rings (3) arranged on the circumference of the classifying wheel (4) and an annular viewing space (5) between them, wherein the Sichtraumbreite increases inwards and the blades are preferably arranged in the radial direction and the Sichtgut between the blade rings (3), (4) enters the viewing space (5), characterized in that the task side the outer side (6) of the classifying wheel (2) and on the task-side boundary wall (7) of the dispersing wheel (20) pin, rod and / or paddle-shaped baffle, impact or dispersing elements (8) are arranged in a circle and engage analogous to the arrangement in pin mills, the dispersing (20) fixed and / or variably rotatable in both directions of rotation, on the job side a further blade ring (9) is arranged directly in front of the viewing space (5), the boundary walls (10) of the deflection zone (18) in the region of the transition from the radial into a lease having an angle greater than 0 to 120 to the radial direction, have the smallest distance and blade ring (9) and the boundary walls (10) rotate together with the classifying wheel (2).
  2. 2. centrifugal air classifier according to item 1, characterized in that the blades of the blade ring (9) are formed as webs between slots.
  3. 3. centrifugal air classifier according to item 1, characterized in that the blades of the outer blade ring (3) in the classifying wheel (2), preferably formed as elements with kreisaus- or kreisabschnittsförmigem cross-section, in the radial direction straight or at radial inner edge on the outer edge to 45 ° are arranged inclined relative to the direction of rotation to the radial direction and at a distance from each other which is at least twice the distance between the blades of the inner blade ring (4) in the classifying wheel (2).
  4. 4. centrifugal air classifier according to item 1, characterized in that the material supply (7) through the housing
    (1) as a tube (12) with adjustable distance to the classifying wheel
    (2) executed and between the pipe (12) and the housing (1) a secondary view air supply (13) is arranged.
  5. 5. Zentrifugalwindsichter according to item 1, characterized in that between the rotating Sichtrad (2) and the housing (1), between the task side rotating boundary wall (10) and the Disper-gierrad (20) and the housing (1) co-rotating fan blades (11), preferably inclined in the direction of rotation and / or concave curved, are arranged.
  6. 6. centrifugal air classifier according to item 1, characterized in that after the dispersing zone (19) the boundary walls (10) experience no change in direction, which deviate from the radial direction.
    For this s \ page
DD28582585A 1985-12-31 1985-12-31 centrifugal separator DD248970A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD28582585A DD248970A1 (en) 1985-12-31 1985-12-31 centrifugal separator

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DD28582585A DD248970A1 (en) 1985-12-31 1985-12-31 centrifugal separator
DE19863638915 DE3638915C2 (en) 1985-12-31 1986-11-14
SU864028747A SU1500394A1 (en) 1985-12-31 1986-12-25 Centrifugal air separator
JP31600086A JPH0420669B2 (en) 1985-12-31 1986-12-29

Publications (1)

Publication Number Publication Date
DD248970A1 true DD248970A1 (en) 1987-08-26

Family

ID=5575586

Family Applications (1)

Application Number Title Priority Date Filing Date
DD28582585A DD248970A1 (en) 1985-12-31 1985-12-31 centrifugal separator

Country Status (4)

Country Link
JP (1) JPH0420669B2 (en)
DD (1) DD248970A1 (en)
DE (1) DE3638915C2 (en)
SU (1) SU1500394A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT109690T (en) * 1988-11-17 1994-08-15 Nied Roland Air classifier.
DE3838871C2 (en) * 1988-01-22 1994-10-27 Nied Roland air classifier
JPH03135482A (en) * 1989-10-20 1991-06-10 Onoda Cement Co Ltd Pneumatic classifier
US5252110A (en) * 1990-08-01 1993-10-12 Roland Nied Preferably vertical air separator
DE4416034A1 (en) * 1994-05-06 1995-07-06 Krupp Foerdertechnik Gmbh Sifting method for fine-grain material
JPH10370A (en) * 1996-06-13 1998-01-06 Kansai Matetsuku Kk Pulverizing pin type pulverizer
AT229377T (en) * 1996-10-18 2002-12-15 Hosokawa Alpine Ag & Co Vertical-axis wind sifter
DE19643042C2 (en) * 1996-10-18 1998-07-30 Hosokawa Alpine Ag Vertical-axis wind sifter
JP4891574B2 (en) * 2004-10-14 2012-03-07 ホソカワミクロン株式会社 Crusher and powder manufacturing method using the crusher
US20130274082A1 (en) * 2012-03-26 2013-10-17 Centrifugal And Mechanical Industries, Llc. Centrifugal Separator With Circular Rotor Blades
RU2630450C1 (en) * 2016-06-29 2017-09-08 федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный технологический университет им. В.Г. Шухова" Disintegrator
RU2628798C1 (en) * 2016-12-22 2017-08-22 федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный технологический университет им. В.Г. Шухова" Disintegrator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE894803C (en) * 1947-02-07 1953-10-29 Alpine A G Eisengiesserei Apparatus and method for wind sifting
DE892266C (en) * 1948-10-02 1954-04-05 Alpine Ag Eisengiesserei & Mas air classifier
DE834319C (en) * 1948-12-10 1952-03-17 Alpine A G Eisengiesserei Und Centrifugal sifting methods
GB1114314A (en) * 1964-12-11 1968-05-22 Ass Portland Cement Improvements in or relating to centrifugal air classifiers
US3491879A (en) * 1967-04-18 1970-01-27 Donaldson Co Inc Centrifugal classifier
JPH0462794B2 (en) * 1982-06-30 1992-10-07 Nitsushin Seifun Kk
JPH046425B2 (en) * 1983-05-18 1992-02-05 Nitsushin Seifun Kk
US4604192A (en) * 1983-05-18 1986-08-05 Nisshin Flour Milling Co., Ltd. Powder classifier

Also Published As

Publication number Publication date
SU1500394A1 (en) 1989-08-15
DE3638915A1 (en) 1987-07-02
DE3638915C2 (en) 1989-01-12
JPS62168556A (en) 1987-07-24
JPH0420669B2 (en) 1992-04-06

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