US3887133A - Atomizer wheel for the atomization of slurries - Google Patents

Atomizer wheel for the atomization of slurries Download PDF

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Publication number
US3887133A
US3887133A US425654A US42565473A US3887133A US 3887133 A US3887133 A US 3887133A US 425654 A US425654 A US 425654A US 42565473 A US42565473 A US 42565473A US 3887133 A US3887133 A US 3887133A
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US
United States
Prior art keywords
projections
wheel
side wall
spoke
central hub
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Expired - Lifetime
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US425654A
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English (en)
Inventor
Orla Straarup
Paul Otto Guenther Helmich
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GEA Process Engineering AS
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Niro Atomizer AS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member
    • B05B3/1021—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with individual passages at its periphery
    • B05B3/1028—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with individual passages at its periphery the passages comprising an insert

Definitions

  • spoke-like projec- [5 I] Int Cl Bosh 3/l0 F23d l 1364b l H00 tions arranged in the interior of the wheel to have one [58] Fieid 'g 239/223 5 228 591 of their ends situated in the region between the side j 66. 47 159/4 wall and the inner ends of the spoke-like projections.
  • the spoke-like projections may be secured to the side ll or be fitted in a body surrounding the central hub [56] References Cited wa of the wheel.
  • a further Increase in the capacity may UNITED STATES PATENTS be obtained by means of axial projections in addition 1,132,814 3/1915 WBSIOI'I et al 233/32 to the p ke
  • ike projections aid axial projections i g 3 being secured to the covering plate of the wheel.
  • I A 15' s 22 l is 10 13 l j I a ⁇ 11 10k 1 2 10: 13 H 10 l j 21 W036! l 1
  • the present invention relates to atomizer wheels for the atomization of slurries, in particular of highly abrasive materials such as cement slurry or slurries of clay, ore concentrates or other minerals.
  • atomizer wheels of the above-mentioned kind it is well-known to line the ejection orifices formed in the cylindrical side wall of the wheel and distributed in one or more rows in the axial direction of the wheel with wear-resistant bushings which usually are manufac tured from a sintered material such as aluminium oxide, tungsten carbide or silicon carbide and are arranged in the orifices so as to project into the interior of the wheel with their inner ends situated a short distance from the inner side of the side wall.
  • wear-resistant bushings which usually are manufac tured from a sintered material such as aluminium oxide, tungsten carbide or silicon carbide and are arranged in the orifices so as to project into the interior of the wheel with their inner ends situated a short distance from the inner side of the side wall.
  • the object of this measure is to deposit a layer of dispersed material on the side wall and thereby protect the side wall against wear, particularly around the ejection orifices.
  • a gradual increase of the diameter of the wheel for example, from I90 to 240 mms will result in a gradually increased capacity up to about 32.4 cubic meters per hour, whereas a further increase of the diameter up to 280 mms will result in a capacity decrease to about 24 cubic meters per hour instead of an increased capacity.
  • an atomizer wheel for the atomization of slurries which comprises a central hub, a substantially cylindrical side wall defining an annular bowl-shaped space concentric with said hub and being formed with a number of ejection orifices, a number of bushings of a wear-resistant material each of which is inserted in an individual one of said orifices so as to project with one end into said bowl shaped space a distance from-the inner side of the side wall and a number of spoke-like projections arranged in said bowl-shaped space with one end of each projection situated in the region between the side wall and the ends of said wear-resistant bushings facing the central hub.
  • wear-resistant material should be understood as comprising, for example, sintered materials such as aluminium oxide, tungsten carbide or silicon carbide or a non-sintered material such as titanium carbide.
  • FIG. 1 is a sectional view along an axial plane through one embodiment of the atomizer wheel according to the invention
  • FIG. 2 is a cross-sectional view along the line li-ll in FIG. 1;
  • FIGS. 3 and 4 show modifications of a fractional part of the atomizer wheel shown in FIG. 1,
  • FIG. 5 is a cross-sectional view along the line V-V in FIG. 4;
  • FIG. 6 is a sectional view along an axial plane through a second embodiment of the atomizer wheel
  • FIG. 7 is a sectional view along an axial plane through a third embodiment of the atomizer wheel.
  • FIG. 8 is a diagrammatical sectional view along a radial plane through a fourth embodiment of the atomizer wheel.
  • the atomizer wheel shown in FIGS. I and 2 comprises a bottom I with a central hub 2, a cylindrical side wall 3 and a covering plate 4. The wheel is secured in a known manner on a drive shaft 6.
  • covering plate 4 In covering plate 4 a central bore is formed through which drive shaft 6 extends in a manner so as to form an annular opening 7 between the drive shaft and covering plate 4 for the introduction of the dispersed material to be atomized into the interior of the wheel in a manner not shown per se.
  • Side wall 3 is formed with a number of ejection orifices which are lined with wear-resistant bushings of a sintered material, only one of said bushings being shown in the figure at 8. As shown, each bushing 8 may be inserted in a sleeve 9.
  • each bushing 8 project into the bowl-shaped space forming the interior of the wheel a short distance from the inner side of the cylindrical side wall 3.
  • a number of spokelike projections 12 are arranged in the interior of the atomizer wheel between the ejection orifices in such a way that the ends of said projections remote from the central hub 2 are situated in the region between the inner side of side wall 3 and the inwardly facing ends of bushings 8 in which a layer of dispersed material is deposited during operation of the wheel.
  • the atomizer wheel is provided with twelve spoke-like projections extending in radial directions of the wheel perpendicular to the axis thereof, only one of said projections being shown in FIG. 1 and only two projections being shown in FIG. 2. The positions of the remaining projections are indicated in FIG.
  • the spoke-like projections 12 are secured to the side wall 3 by means of pins 15 which are mounted in bores in the side wall and secured to the wall by means of collarshaped flange members 15', said pins fitting in corresponding axial bores in projections 12. It will appear from the following that the projections may be secured in other suitable ways, provisions being taken, however, to account for the fact that projections 12 when made of a sintered material may be subjected substantially to pressure forces only.
  • FIGS. 1 and 2 While the ejection orifices, on one hand, and the spoke-like projections, on the other hand, in the embodiment shown in FIGS. 1 and 2 are shown as being distributed in two rows it will be appreciated that they may be distributed in a single row or in more than two rows and that the number of projections may differ from the number of orifices. However, it applies in any circumstances that the orifices and the projections have to be distributed in a manner so as to secure that the wheel is balanced statically as well as during operation.
  • projections I2 have the form of truncated cones and the cross-sectional area of each projection decreases in the direction towards the central hub 2.
  • the projections are proportioned so that they extend in the axial direction of the wheel only through part of the bowl-shaped space in the interior of the wheel, whereby clearances are obtained between the projections and the bottom 1 as well as the covering plate 4 with the result that wear on these parts of the wheel is reduced to the lowest degree possible.
  • FIG. 3 another way of securing the projections to the side wall are illustrated for a fractional part of the wheel shown in FIGS. 1 and 2, the spoke-like projection being disignated by 18.
  • the solution illustrated in FIG. 3 is particularly suitable in case of providing an existing atomizer wheel with spoke-like projections in accordance with the invention and according to this solution a suitable number of the ejection orifices already present are closed by plug members as shown at 16, into which pins 17 having for this purpose a threaded end are screwed, said pins being formed in their other ends to fit into axial bores in projections 18 which have the form of truncated cones just like the embodiment shown in FIGS. 1 and 2.
  • the spoke-like projections need not necessarily be conical, but may as an alternative be wedgeshaped such as illustrated in FIGS. 4 and 5 which show the same fractional part as shown in FIG. 3 of the wheel shownin FIGS. 1 and 2.
  • the cross-sectional area of each of the wedge-shaped projections which are designated by 19 decreases in the direction towards the central hub of the atomizer wheel just like the embodiments of FIGS. 1-2 and 3.
  • the wedge-shaped form is obtained due to the fact that each projection is defined in the axial direction of the wheel by inclined planes which are symmetrical about a radial symmetry plane through the projection.
  • the wedge-shaped projections 19 are arranged in the atomizer wheel with their greatest cross-sectional dimension extending perpendicularly to the axial direction of the wheel.
  • the spoke-like projections which may, for example, have the form of truncated cones, may be secured to side wall 3 between two rows of ejection orifices and have such a dimension in the axial direction of the wheel that both rows are covered, clearances being still provided between the projections and the bottom 1 as well as the covering plate 4.
  • annular insert 21 of a wear-resistant material may be arranged, in a manner known per se, in contact with bottom 1.
  • a body 22 forming a guide surface for the slurry introduced into the wheel may be arranged around hub 2 in the interior of the wheel.
  • FIG 6 another embodiment of the atomizer wheel is illustrated.
  • the structure of the wheel comprising bottom 1, hub 2, side wall 3 and ejection orifices lined with wear-resistant bushings 8 is exactly the same as shown in FIGS. 1 and 2.
  • the spoke-like projections 23 which extend in radial directions are fitted in the abovementioned guide body 22 surrounding hub 2 by means of pins 24 having in one end a collar-shaped flange member 25 forming an abutment face for the outer end of projection 23 and being threaded in the opposite end to be screwed into tapped bores in body 22.
  • projections 23 and pins 24 have such a length that the outer ends of the projections are situated in the region between side wall 3 and the ends of wear-resistant bushings 8 facing hub 2, in which a layer of dispersed material is deposited during operation of the wheel.
  • the flange member 25 which together with pin 24 may be made of steel is completely located in said region in which it is subjected to the lowest possible degree of wear.
  • FIG. 7 a still further embodiment is illustrated which is particularly suitable for atomizer wheels having very great dimensions.
  • the structure of the wheel comprising a bottom 26, a hub 27, a cylindrical side wall 28, a covering plate 29 and the ejection orifices lined with wear-resistant bushings 30 is essentially the same as shown in FIGS. 1, 2 and 6 apart from the considerably greater wheel diameter.
  • the radially extending spoke-like projections 31 in FIG. 7 are mounted on pins 33 which are fitted in a body 32 surrounding hub 27 and forming a guide surface for the fluid slurry introduced into the wheel.
  • pins 33 extend substantially to side wall 28, their outer ends being separated, for example, by 0.5 to l mm from the inner side thereof, and are not provided with collarshaped abutting flange members, while projections 31 are slideably mounted on pins 33 with a certain longitudinal slip so that they will be pressed during operation of the wheel from a position, in which their inner ends abut against body 32, towards a position in which their outer ends abut against side wall 28.
  • an improved effect of the projections is obtained by means of a number of additional, axially extending projections 35 arranged in the bowl-shaped space of the atomizer wheel, said axial projections being secured to covering plate 29 at a shorter distance from hub 27 than from side wall 28 by means of threaded pins 36 which is provided with abutting flange members 37.
  • projections 35 are arranged with their greatest dimension parallel to the axial direction of the atomizer wheel, these projections and the areas surrounding their contact faces in covering plate are not particularly subject to wear in this embodiment, because the velocity of the fluid slurry at this place is low relative to that of the wheel.
  • the spoke-like projections extending transversely to the axis of the atomizer wheel have been radially directed, as a result of which an optimum effect is obtained.
  • the spoke-like projections 38 it might be expedient in certain cases to arrange the spoke-like projections 38 with backward inclinations relative to the rotational direction of the wheel seen from the ends of the projections closest to side wall 3, such as diagrammatically illustrated in FIG. 8, since fluid slurry entering the wheel will then have a lower tendency to disturb the layer of dispersed material deposited during operation of the wheel on the side wall around the ends of the projections.
  • EXAMPLE I A cement slurry having a total solids content of 56 per cent was atomized by means of an atomizer wheel as shown in FIGS. 1 and 2, but having no projections.
  • the outer diameter of the wheel was 225 mms, and the number of ejection orifices was 24, all of which were lined with inwardly projecting, conical bushings of a wear-resistant, sintered material.
  • EXAMPLE 2 An atomizer wheel of the type mentioned in example I, but having a diameter of 280 mms, was used. Like example I, the number of ejection orifices was 24, all of which were lined with inwardly facing, wearresistant bushings.
  • An atomizer wheel for the atomization of slurries comprising a central hub, a substantially cylindrical side wall defining an annular bowl-shaped space concentric with said hub and being formed with a number of ejection orifices, a number of bushings of a wearresistant material each of which is inserted in an individual one of said orifices so as to project with one end into said bowl-shaped space a distance from the inner side of the side wall and a number of spoke-like projections arranged in said bowl-shaped space with one end of each projection situated in the region between the side wall and the ends of said wear-resistant bushings facing the central hub.
  • An atomizer wheel as claimed in claim 1 further comprising a bottom plate extending between the central hub and the cylindrical side wall and a covering plate connected with the side wall, said bottom and covering plates limiting the bowl-shaped space in the axial direction of the wheel, said spoke-like projection furthermore being proportioned with such a dimension in the axial direction of the wheel that clearances are left between the projections and the bottom plates as well as the covering plate.
  • An atomizer wheel as claimed in claim 2 further comprising a number of projections extending in the axial direction of the wheel and being secured to said covering plate at a shorter distance from the central hub than from the side wall.
  • spoke-like projections are fitted in a body surrounding the central hub and have their outer ends situated in said region between the side wall and the ends of the wear-resistant bushings facing the central hub.

Landscapes

  • Nozzles (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Treatment Of Sludge (AREA)
US425654A 1972-12-18 1973-12-17 Atomizer wheel for the atomization of slurries Expired - Lifetime US3887133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5841972A GB1434203A (en) 1972-12-18 1972-12-18 Atomizer wheels for the atomization of slurries

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US3887133A true US3887133A (en) 1975-06-03

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US425654A Expired - Lifetime US3887133A (en) 1972-12-18 1973-12-17 Atomizer wheel for the atomization of slurries

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US (1) US3887133A (de)
JP (1) JPS5713342B2 (de)
AR (1) AR204087A1 (de)
AU (1) AU461264B2 (de)
BE (1) BE808444A (de)
CA (1) CA984875A (de)
DD (1) DD108909A5 (de)
DE (1) DE2361123C2 (de)
DK (1) DK141478B (de)
ES (1) ES421772A1 (de)
FI (1) FI54072C (de)
FR (1) FR2330253A5 (de)
GB (1) GB1434203A (de)
IT (1) IT1000518B (de)
SE (1) SE394969B (de)
SU (1) SU692545A3 (de)
ZA (1) ZA739353B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121770A (en) * 1976-01-26 1978-10-24 A/S Niro Atomizer Wear-resistant rotor wheel
US4684065A (en) * 1985-04-10 1987-08-04 A/S Niro Atomizer Atomizer wheel with steel bushings
US4881956A (en) * 1983-03-18 1989-11-21 J. Edwards Enterprises Method and device for cleaning particulate-laden gases
US4898331A (en) * 1988-12-22 1990-02-06 A/A Niro Atomizer Atomizer wheel with bushings of different inwardly protruding lengths
US5226605A (en) * 1992-09-30 1993-07-13 Barr & Murphy (Canada) Ltee/Ltd. Rotary atomizer disk with replaceable nozzle inserts and method for replacing inserts
US5294059A (en) * 1992-06-09 1994-03-15 Willan W Craig Device for directing the flow of an atomized slurry
WO1994011077A1 (en) * 1992-11-12 1994-05-26 Niro Holding A/S An atomizer wheel assembly and an element therefor
US5356075A (en) * 1990-07-10 1994-10-18 Apv Pasilac Anhydro As Atomizer wheel with a divided wear ring
EP1184081A2 (de) 2000-09-01 2002-03-06 Niro A/S Zerstäuberrad mit verschleissbeständigen Einsätzen
EP1038586A3 (de) * 1999-03-24 2003-07-23 Akzo Nobel N.V. Zerstäuberrad mit verbesserten Düsen für rotierende Zerstäuber
US20050006496A1 (en) * 2000-08-03 2005-01-13 Barry Partington Apparatus and method for producing porous polymer particles
US20120048966A1 (en) * 2008-09-09 2012-03-01 John Bulder Rotary Atomizer with Metal Foam Inserts
US9095866B2 (en) 2011-02-08 2015-08-04 Inland Pipe Rehabilitation Llc Method and apparatus for application of mortar
US9138758B2 (en) 2011-02-08 2015-09-22 Inland Pipe Rehabilitation Llc Method and apparatus for application of mortar

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007222783A (ja) * 2006-02-23 2007-09-06 Mitsubishi Heavy Ind Ltd ロータリーアトマイザの噴霧用ディスク構造

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1132814A (en) * 1911-05-09 1915-03-23 David B Weston Centrifugal separator.
US2911139A (en) * 1955-12-20 1959-11-03 Dorr Oliver Inc Centrifuge construction
US3125516A (en) * 1960-03-14 1964-03-17 Peripheral discharge sludge collection centrifugal drum
US3355106A (en) * 1964-04-30 1967-11-28 Stratford Eng Corp Mixing atomizing rotor
US3419220A (en) * 1966-11-30 1968-12-31 Gulf Research Development Co Nozzles for abrasive-laden slurry
US3454226A (en) * 1965-03-26 1969-07-08 Niro Atomizer As Atomizer wheel for the atomization of suspensions of hard-wearing materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK124566B (da) * 1968-11-05 1972-10-30 Niro Atomizer As Forstøverhjul med slidfaste sintrede bøsninger.
GB1526381A (en) * 1976-01-26 1978-09-27 Niro Atomizer As Wear-resistant rotor wheel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1132814A (en) * 1911-05-09 1915-03-23 David B Weston Centrifugal separator.
US2911139A (en) * 1955-12-20 1959-11-03 Dorr Oliver Inc Centrifuge construction
US3125516A (en) * 1960-03-14 1964-03-17 Peripheral discharge sludge collection centrifugal drum
US3355106A (en) * 1964-04-30 1967-11-28 Stratford Eng Corp Mixing atomizing rotor
US3454226A (en) * 1965-03-26 1969-07-08 Niro Atomizer As Atomizer wheel for the atomization of suspensions of hard-wearing materials
US3419220A (en) * 1966-11-30 1968-12-31 Gulf Research Development Co Nozzles for abrasive-laden slurry

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121770A (en) * 1976-01-26 1978-10-24 A/S Niro Atomizer Wear-resistant rotor wheel
US4881956A (en) * 1983-03-18 1989-11-21 J. Edwards Enterprises Method and device for cleaning particulate-laden gases
US4684065A (en) * 1985-04-10 1987-08-04 A/S Niro Atomizer Atomizer wheel with steel bushings
US4898331A (en) * 1988-12-22 1990-02-06 A/A Niro Atomizer Atomizer wheel with bushings of different inwardly protruding lengths
EP0375236A2 (de) * 1988-12-22 1990-06-27 A/S Niro Atomizer Zerstäubungsrad mit nach innen vorstehenden Düsenbuchsen von verschiedener Länge
EP0375236A3 (de) * 1988-12-22 1991-05-29 A/S Niro Atomizer Zerstäubungsrad mit nach innen vorstehenden Düsenbuchsen von verschiedener Länge
US5356075A (en) * 1990-07-10 1994-10-18 Apv Pasilac Anhydro As Atomizer wheel with a divided wear ring
US5294059A (en) * 1992-06-09 1994-03-15 Willan W Craig Device for directing the flow of an atomized slurry
US5226605A (en) * 1992-09-30 1993-07-13 Barr & Murphy (Canada) Ltee/Ltd. Rotary atomizer disk with replaceable nozzle inserts and method for replacing inserts
WO1994011077A1 (en) * 1992-11-12 1994-05-26 Niro Holding A/S An atomizer wheel assembly and an element therefor
EP1038586A3 (de) * 1999-03-24 2003-07-23 Akzo Nobel N.V. Zerstäuberrad mit verbesserten Düsen für rotierende Zerstäuber
US6631851B1 (en) * 1999-03-24 2003-10-14 Akzo Nobel N.V. Atomizer wheel with improved nozzle for rotary atomizers and method of obtaining microspherical solid particles
US20050006496A1 (en) * 2000-08-03 2005-01-13 Barry Partington Apparatus and method for producing porous polymer particles
US7207499B2 (en) * 2000-08-03 2007-04-24 Prometic Biosciences Ltd Apparatus and method for producing porous polymer particles
US6457657B1 (en) 2000-09-01 2002-10-01 Niro A/S Atomizer wheel with wear-resistant inserts
EP1184081A3 (de) * 2000-09-01 2002-08-28 Niro A/S Zerstäuberrad mit verschleissbeständigen Einsätzen
EP1184081A2 (de) 2000-09-01 2002-03-06 Niro A/S Zerstäuberrad mit verschleissbeständigen Einsätzen
CZ301079B6 (cs) * 2000-09-01 2009-10-29 Niro A/S Rozprašovací kolo a vložka pro rozprašovací kolo
US20120048966A1 (en) * 2008-09-09 2012-03-01 John Bulder Rotary Atomizer with Metal Foam Inserts
US9095866B2 (en) 2011-02-08 2015-08-04 Inland Pipe Rehabilitation Llc Method and apparatus for application of mortar
US9138758B2 (en) 2011-02-08 2015-09-22 Inland Pipe Rehabilitation Llc Method and apparatus for application of mortar

Also Published As

Publication number Publication date
GB1434203A (en) 1976-05-05
DE2361123C2 (de) 1984-08-09
CA984875A (en) 1976-03-02
AU461264B2 (en) 1975-05-22
AR204087A1 (es) 1975-11-20
FR2330253A5 (fr) 1977-05-27
SE394969B (sv) 1977-07-25
ZA739353B (en) 1974-10-30
DD108909A5 (de) 1974-10-12
IT1000518B (it) 1976-04-10
JPS5713342B2 (de) 1982-03-16
DK141478B (da) 1980-03-24
SU692545A3 (ru) 1979-10-15
FI54072B (fi) 1978-06-30
AU6352573A (en) 1975-05-22
JPS4996360A (de) 1974-09-12
DK141478C (de) 1989-08-14
BE808444A (fr) 1974-03-29
FI54072C (fi) 1978-10-10
ES421772A1 (es) 1976-05-01
DE2361123A1 (de) 1974-06-20

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