US3711025A - Centrifugal atomizing device - Google Patents
Centrifugal atomizing device Download PDFInfo
- Publication number
- US3711025A US3711025A US00124497A US3711025DA US3711025A US 3711025 A US3711025 A US 3711025A US 00124497 A US00124497 A US 00124497A US 3711025D A US3711025D A US 3711025DA US 3711025 A US3711025 A US 3711025A
- Authority
- US
- United States
- Prior art keywords
- disc
- pins
- plate
- pin
- 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
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/20—Sprayers
Definitions
- This invention pertains to an improved design for a centrifugal atomizer of the general type in which there is a rotating disc, a plurality of pins mounted normally on the perimeter of the disc, and an upper annular plate mounted on the pins and parallel to the disc.
- a centrifugal atomizer serves, e.g. in a spray drier, to disperse fluids or slurries of pulverulent solidsthrough the effect of centrifugal force.
- a centrifugal atomizer of the above mentioned type is subject to troublesome wear on the pins, disc, and upper plate even when used with only slightly abrasive materials.
- Cylindrical pins, as heretofore used have formed right angle junctures with the disc and with the plate, the result being that a concentration of abrasive wear quickly occurs at the junctures, i.e. giving rise to deep grooves in the regions of the disc and plate adjacent the pin.
- the aforementioned problems of abrasive wear of a centrifugal atomizer can be virtually eliminated by the use of pins which are flared outwardly at both ends forming a working surface that is smoothly curved.
- the flared ends of the pin thus extend to the plane of the disc and to the plane of the upper annular plate, respectively.
- a tangential juncture will occur where the pin joins the disc and annular plate.
- FIG. 1 depicts an axial cross-sectional view of a pin used in accordance with this invention.
- FIG. 2 shows a centrifugal atomizer adapted for use in a spray drier, with a vertical cross-sectional view of the interior displayed in a cutout.
- FIG. 3 is a cross section normal to the axis along radius 33 of FIG. 2.
- improved pin is perpendicularly located between a disc 20 and annular upper plate 16.
- the disc and annular upper plate each have an inner plane which faces the other.
- the pin is constructed with flared sections 12 which tangentially approach the inner plane of the disc and the inner plane of the annular upper plate in such a manner that the surfaces of the disc, pin and annular upper plate join in a smooth curve.
- the pin is provided with a cylindrical projection 14 at the disc end which is then recessed into the disc for stability against centrifugal force.
- the annular upper plate is rovided with Ii 34 which provides a recess in WhlC the pin fits t ereby increasing the strength of the pin to withstand centrifugal force.
- a bolt 18 passes through the annular upper plate, pin and disc in order that they remain in their desired position.
- hub section 22 is integrally attached to disc 20 adjacent to the rotating drive means.
- Feed inlet pipe'30 is positioned between the annular upper plate and hub section perpendicular to the plane of the disc.
- the atomizer is surrounding by concentric chamber 32. The atomized material leaves the chamber through outlet hopper 36.
- the improved pin of this invention has a working surface that is smoothly curved in order to substantially reduce the concentration of abrasive action which would occur at a sharp juncture.
- the smoothly curved pin is constructed so that the flare has at least a minimum radius of curvature of one-eighth inch to prevent serious erosion of the plate, disc and the pin. Sharper curvatures tend to concentrate wear in much the same manner as the prior non-flared pins. It is preferable to have the surface of the flared section approach the plane of the disc and the plane of the plate tangentially so as to further reduce the abrading action of the material being dispersed.
- the material to be treated for example, a slurry of pigmentary titanium dioxide particles
- a slurry of pigmentary titanium dioxide particles is fed between the annular upper plate and the hub.
- the spinning of the disc forces the slurry violently outward by centrifugal action causing atomization of the slurry.
- the curvature on the pins effectively prevents abrasive wear of the pins and, more importantly, adjacent regions of the disc and plate.
- the atomized slurry can then be contacted with air or another vapor to effect drying.
- a centrifugal atomizer comprising a disc, an axially located drive means for rotating the disc, a plurality of pins mounted normally to the disc on the periphery thereof, and an annular plate mounted on the pins and parallel to the disc; the improvement wherein the ends of the pins are outwardly flared to provide smoothly curved junctures with the disc and with the plate, said junctures having a minimum radius of curvature of one-eight inch.
- a centrifugal atomizer according to claim 1 wherein the outwardly flared portions of the pin tangentially approach the disc andplate, respectively.
Abstract
In a centrifugal atomizer comprising a rotatable disc, a plurality of pins mounted normally on the perimeter of the disc, and an upper annular plate mounted on the pins and parallel to the disc, erosion of the disc and annular plate is reduced by outwardly flaring the ends of the pins.
Description
United States Patent 1 Miller 51 Jan. 16,1973
l l l 1 1 CENTRIFUGAL ATOMIZING DEVICE Ralph N. Miller, Newark, Del.
Assignee: E. l. du Pont de Nemours and Company, Wilmington, Del.
Filed: March 15, 1971 Appl. No.1 124,497 I Related U.S. Application Data Continuation-impart of Ser. No. 849,440, Aug. 12, 1969, abandoned.
lnventor:
U.S. Cl ..239/222.l 1, 239/380 Int. Cl. ..B05b l/26 Field of Search ..239/214, 222.11, 222, 223,
Primary Examiner-M. Henson Wood, .lr. Assistant Examiner-Michael Y. Mar Attorney-Donald A. Hoes [57] ABSTRACT In a centrifugal atomizer comprising a rotatable disc, a
plurality of pins mounted normally on the perimeter of the disc, and an upper annular plate mounted on the pins and parallel to the disc, erosion of the disc and annular plate is reduced by outwardly flaring the ends of the pins.
' 2 Claims, 3 Drawing Figures a" mun PATENTEDJAM 18 I975 3.711.025
SHEET 2 [IF 2 INVENTOR Q 3 BY w Mm ATTORNEY CENTRIFUGAL ATOMIZING DEVICE CROSS REFERENCE TO RELATED APPLICATION This application is a continuation-in-part of application Ser. No. 849,440, filed Aug. l2, 1969 now abandoned.
BACKGROUND OF THE INVENTION This invention pertains to an improved design for a centrifugal atomizer of the general type in which there is a rotating disc, a plurality of pins mounted normally on the perimeter of the disc, and an upper annular plate mounted on the pins and parallel to the disc. Such an atomizer serves, e.g. in a spray drier, to disperse fluids or slurries of pulverulent solidsthrough the effect of centrifugal force.
A centrifugal atomizer of the above mentioned type is subject to troublesome wear on the pins, disc, and upper plate even when used with only slightly abrasive materials. Cylindrical pins, as heretofore used, have formed right angle junctures with the disc and with the plate, the result being that a concentration of abrasive wear quickly occurs at the junctures, i.e. giving rise to deep grooves in the regions of the disc and plate adjacent the pin. Whereas abrasive wear on the pins themselves can be minimized by constructing the pins from hard materials such as metal carbides, cermets and ceramics, these same materials are unsuitable for construction of the disc and plate because they lack the structural strength of metals and hence cannot adequately resist the high centrifugal force developed by rotation of the atomizer. Attempts to use a hard surfacing treatment for those regions of disc and plate which are most susceptible to wear will reduce but not suitably eliminate the problem of abrasive wear.
SUMMARY OF THE INVENTION In accordance with the present invention the aforementioned problems of abrasive wear of a centrifugal atomizer can be virtually eliminated by the use of pins which are flared outwardly at both ends forming a working surface that is smoothly curved. The flared ends of the pin thus extend to the plane of the disc and to the plane of the upper annular plate, respectively. Preferably, a tangential juncture will occur where the pin joins the disc and annular plate.
FIG. 1 depicts an axial cross-sectional view of a pin used in accordance with this invention.
FIG. 2 shows a centrifugal atomizer adapted for use in a spray drier, with a vertical cross-sectional view of the interior displayed in a cutout.
FIG. 3 is a cross section normal to the axis along radius 33 of FIG. 2.
In the drawings, improved pin is perpendicularly located between a disc 20 and annular upper plate 16. The disc and annular upper plate each have an inner plane which faces the other. The pin is constructed with flared sections 12 which tangentially approach the inner plane of the disc and the inner plane of the annular upper plate in such a manner that the surfaces of the disc, pin and annular upper plate join in a smooth curve. The pin is provided with a cylindrical projection 14 at the disc end which is then recessed into the disc for stability against centrifugal force. The annular upper plate is rovided with Ii 34 which provides a recess in WhlC the pin fits t ereby increasing the strength of the pin to withstand centrifugal force. A bolt 18 passes through the annular upper plate, pin and disc in order that they remain in their desired position. In order to securely join the disc to an axially located rotating drive means 24, hub section 22 is integrally attached to disc 20 adjacent to the rotating drive means. As shown in FIG. 3, the flares of the pins vconterminously fit with the adjacent pins as sectors of an annular ring thus completely covering the peripheral area 28 of the disc. Feed inlet pipe'30 is positioned between the annular upper plate and hub section perpendicular to the plane of the disc. The atomizer is surrounding by concentric chamber 32. The atomized material leaves the chamber through outlet hopper 36.
The improved pin of this invention has a working surface that is smoothly curved in order to substantially reduce the concentration of abrasive action which would occur at a sharp juncture. Preferably the smoothly curved pin is constructed so that the flare has at least a minimum radius of curvature of one-eighth inch to prevent serious erosion of the plate, disc and the pin. Sharper curvatures tend to concentrate wear in much the same manner as the prior non-flared pins. It is preferable to have the surface of the flared section approach the plane of the disc and the plane of the plate tangentially so as to further reduce the abrading action of the material being dispersed. Additional protection of the disc and plate is provided by designing the flared sections to conterminously fit with the flared sections of the adjacent pins thereby completely covering the peripheral area of the disc and of the plate. Bolts passing through the plate and disc and through a vertical axis of the pin secure the assembly.
In operation, the material to be treated, for example, a slurry of pigmentary titanium dioxide particles, is fed between the annular upper plate and the hub. The spinning of the disc forces the slurry violently outward by centrifugal action causing atomization of the slurry. The curvature on the pins effectively prevents abrasive wear of the pins and, more importantly, adjacent regions of the disc and plate. The atomized slurry can then be contacted with air or another vapor to effect drying.
What is claimed is:
1. In a centrifugal atomizer comprising a disc, an axially located drive means for rotating the disc, a plurality of pins mounted normally to the disc on the periphery thereof, and an annular plate mounted on the pins and parallel to the disc; the improvement wherein the ends of the pins are outwardly flared to provide smoothly curved junctures with the disc and with the plate, said junctures having a minimum radius of curvature of one-eight inch.
2. A centrifugal atomizer according to claim 1 wherein the outwardly flared portions of the pin tangentially approach the disc andplate, respectively.
Claims (2)
1. In a centrifugal atomizer comprising a disc, an axially located drive means for rotating the disc, a plurality of pins mounted normally to the disc on the periphery thereof, and an annular plate mounted on the pins and parallel to the disc; the improvement wherein the ends of the pins are outwardly flared to provide smoothly curved junctures with the disc and with the plate, said junctures having a minimum radius of curvature of one-eight inch.
2. A centrifugal atomizer according to claim 1 wherein the outwardly flared portions of the pin tangentially approach the disc and plate, respectively.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12449771A | 1971-03-15 | 1971-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3711025A true US3711025A (en) | 1973-01-16 |
Family
ID=22415221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00124497A Expired - Lifetime US3711025A (en) | 1971-03-15 | 1971-03-15 | Centrifugal atomizing device |
Country Status (2)
Country | Link |
---|---|
US (1) | US3711025A (en) |
DE (1) | DE2212544C3 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4541566A (en) * | 1981-07-14 | 1985-09-17 | Ohkawara Kakohki Kabushiki Kaisha | Atomizing disc for a centrifugal atomizer |
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 |
US5964413A (en) * | 1997-11-05 | 1999-10-12 | Mok; Peter | Apparatus for dispensing slurry |
US20050032469A1 (en) * | 2003-04-16 | 2005-02-10 | Duescher Wayne O. | Raised island abrasive, lapping apparatus and method of use |
US20050118939A1 (en) * | 2000-11-17 | 2005-06-02 | Duescher Wayne O. | Abrasive bead coated sheet and island articles |
US20080299875A1 (en) * | 2000-11-17 | 2008-12-04 | Duescher Wayne O | Equal sized spherical beads |
US7632434B2 (en) | 2000-11-17 | 2009-12-15 | Wayne O. Duescher | Abrasive agglomerate coated raised island articles |
US8062098B2 (en) | 2000-11-17 | 2011-11-22 | Duescher Wayne O | High speed flat lapping platen |
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US9359554B2 (en) | 2012-08-17 | 2016-06-07 | Suncoke Technology And Development Llc | Automatic draft control system for coke plants |
WO2014105065A1 (en) | 2012-12-28 | 2014-07-03 | Suncoke Technology And Development Llc. | Vent stack lids and associated systems and methods |
US10883051B2 (en) | 2012-12-28 | 2021-01-05 | Suncoke Technology And Development Llc | Methods and systems for improved coke quenching |
US9273250B2 (en) | 2013-03-15 | 2016-03-01 | Suncoke Technology And Development Llc. | Methods and systems for improved quench tower design |
JP2017526798A (en) | 2014-09-15 | 2017-09-14 | サンコーク テクノロジー アンド ディベロップメント リミテッド ライアビリティ カンパニー | Coke oven with monolith component structure |
CN107922846B (en) | 2015-01-02 | 2021-01-01 | 太阳焦炭科技和发展有限责任公司 | Integrated coker automation and optimization using advanced control and optimization techniques |
WO2020140074A1 (en) | 2018-12-28 | 2020-07-02 | Suncoke Technology And Development Llc | Improved oven uptakes |
WO2020142391A1 (en) * | 2018-12-31 | 2020-07-09 | Suncoke Technology And Development Llc | Methods and systems for providing corrosion resistant surfaces in contaminant treatment systems |
US11946108B2 (en) | 2021-11-04 | 2024-04-02 | Suncoke Technology And Development Llc | Foundry coke products and associated processing methods via cupolas |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1560527A (en) * | 1921-12-08 | 1925-11-10 | Edwin M Bassler | Spraying apparatus |
US2159201A (en) * | 1937-12-23 | 1939-05-23 | Bowen William Spencer | Atomizer |
US2814527A (en) * | 1954-11-10 | 1957-11-26 | Foremost Dairies Inc | Centrifugal atomizer |
US2901177A (en) * | 1956-08-30 | 1959-08-25 | Edward O Norris | Spraying apparatus |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2357050A (en) * | 1942-09-23 | 1944-08-29 | Bowen Res Corp | Atomizer head |
US2624624A (en) * | 1948-11-26 | 1953-01-06 | Karlsruhe Augsburg Iweka | Sprayer nozzle |
-
1971
- 1971-03-15 US US00124497A patent/US3711025A/en not_active Expired - Lifetime
-
1972
- 1972-03-15 DE DE2212544A patent/DE2212544C3/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1560527A (en) * | 1921-12-08 | 1925-11-10 | Edwin M Bassler | Spraying apparatus |
US2159201A (en) * | 1937-12-23 | 1939-05-23 | Bowen William Spencer | Atomizer |
US2814527A (en) * | 1954-11-10 | 1957-11-26 | Foremost Dairies Inc | Centrifugal atomizer |
US2901177A (en) * | 1956-08-30 | 1959-08-25 | Edward O Norris | Spraying apparatus |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4541566A (en) * | 1981-07-14 | 1985-09-17 | Ohkawara Kakohki Kabushiki Kaisha | Atomizing disc for a centrifugal atomizer |
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 |
US5964413A (en) * | 1997-11-05 | 1999-10-12 | Mok; Peter | Apparatus for dispensing slurry |
US20050118939A1 (en) * | 2000-11-17 | 2005-06-02 | Duescher Wayne O. | Abrasive bead coated sheet and island articles |
US20080299875A1 (en) * | 2000-11-17 | 2008-12-04 | Duescher Wayne O | Equal sized spherical beads |
US7632434B2 (en) | 2000-11-17 | 2009-12-15 | Wayne O. Duescher | Abrasive agglomerate coated raised island articles |
US8062098B2 (en) | 2000-11-17 | 2011-11-22 | Duescher Wayne O | High speed flat lapping platen |
US8256091B2 (en) | 2000-11-17 | 2012-09-04 | Duescher Wayne O | Equal sized spherical beads |
US8545583B2 (en) | 2000-11-17 | 2013-10-01 | Wayne O. Duescher | Method of forming a flexible abrasive sheet article |
US20050032469A1 (en) * | 2003-04-16 | 2005-02-10 | Duescher Wayne O. | Raised island abrasive, lapping apparatus and method of use |
US7520800B2 (en) | 2003-04-16 | 2009-04-21 | Duescher Wayne O | Raised island abrasive, lapping apparatus and method of use |
Also Published As
Publication number | Publication date |
---|---|
DE2212544B2 (en) | 1980-12-11 |
DE2212544C3 (en) | 1981-07-30 |
DE2212544A1 (en) | 1972-09-21 |
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