US3371782A - Centrifugal air classifiers - Google Patents

Centrifugal air classifiers Download PDF

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Publication number
US3371782A
US3371782A US512308A US51230865A US3371782A US 3371782 A US3371782 A US 3371782A US 512308 A US512308 A US 512308A US 51230865 A US51230865 A US 51230865A US 3371782 A US3371782 A US 3371782A
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US
United States
Prior art keywords
rotor
casing
classified
carrier fluid
particles
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
Application number
US512308A
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English (en)
Inventor
Meyer Paul
Humphreys Geoffrey Daniel
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GEOFFREY DANIEL HUMPHREYS
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Individual
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Filing date
Publication date
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Application granted granted Critical
Publication of US3371782A publication Critical patent/US3371782A/en
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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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B07B4/025—Separating 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
    • 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

Definitions

  • the minimum air quantity, to make efficient separation possible will be pumped through the rotor to keep down the power input, both on pumping and on turning the rotor.
  • the constant ratio type rotor which makes effective separation possible at high dust burdens, this leads to rotors, which are of low depth at their periphery, and hence are compact and easy to manufacture.
  • FIGURE 1 is a sectional elevation of a constant ratio type powder fed classifier in accordance with the invention.
  • the classifier comprises a casing indicated generally at 22, mounted to rotate within which is a rotor 2, the rotor 2 being fast on a central shaft 3 which is journalled in bearings in a housing 23 extending upwardly through the conical rejects section of the casing 22.
  • Air is admitted through a feed pipe 31 which opens into an annular chamber 34 above the cover plate 21 of casing 22 which is joined by conical section 51 to the underside of volute chamber 35.
  • the inner wall of chamber 34 is constructed in the form of a volute so that the air pressure is evenly balanced.
  • Opening out of the bottom of chamber 34 is a cylindrical passage 57 provided by a flange plate 57 whose lower end terminates immediately opposite the inlet to the rotor.
  • Radial Vanes 52' spaced equidistantly around the top plate 52 reduce leakage of air over the top of the rotor.
  • a rotary air classifier as claimed in claim 4 when used for treatment of the material in a fluidized condition characterised in that the inner and outer sections of the shroud are axially spaced so that the flow section of the rotor inwardly of the entrant slot for raw material has a stepwise increase to accommodate the additional air flow from the fluidized bed.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
US512308A 1964-12-11 1965-12-08 Centrifugal air classifiers Expired - Lifetime US3371782A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB50647/64A GB1114314A (en) 1964-12-11 1964-12-11 Improvements in or relating to centrifugal air classifiers

Publications (1)

Publication Number Publication Date
US3371782A true US3371782A (en) 1968-03-05

Family

ID=10456769

Family Applications (2)

Application Number Title Priority Date Filing Date
US512308A Expired - Lifetime US3371782A (en) 1964-12-11 1965-12-08 Centrifugal air classifiers
US512309A Expired - Lifetime US3371783A (en) 1964-12-11 1965-12-08 Centrifugal air classifiers

Family Applications After (1)

Application Number Title Priority Date Filing Date
US512309A Expired - Lifetime US3371783A (en) 1964-12-11 1965-12-08 Centrifugal air classifiers

Country Status (4)

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US (2) US3371782A (enrdf_load_html_response)
AT (1) AT281566B (enrdf_load_html_response)
DE (1) DE1782775B2 (enrdf_load_html_response)
GB (1) GB1114314A (enrdf_load_html_response)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498454A (en) * 1968-02-20 1970-03-03 Polaroid Corp Counter-current centrifugal device and use
US3651941A (en) * 1969-03-24 1972-03-28 Westinghouse Electric Corp Disc-centrifuge apparatus
US3670886A (en) * 1970-08-05 1972-06-20 Hosokawa Funtaikogaku Kenkyush Powder classifier
US3891543A (en) * 1971-02-03 1975-06-24 Josef Wessel Centrifugal sifter apparatus
CN102962120A (zh) * 2012-12-13 2013-03-13 吉林省电力有限公司电力科学研究院 电站锅炉回粉分离器
CN110237898A (zh) * 2019-05-08 2019-09-17 辉县市新科机械设备有限公司 真空粉碎机

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362536A (en) * 1981-06-08 1982-12-07 Kamyr, Inc. Pulp degassing
GB2135913B (en) * 1983-03-03 1987-05-28 Roger Selly Sorting method and machine
US4729760A (en) * 1985-01-07 1988-03-08 Pierre Saget Apparatus for the centrifugal separation of a mixture of phases
HU197230B (en) * 1985-06-20 1989-03-28 Magyar Aluminium Apparatus for classifying or separating solid and in given case high-pure materials
DD248970A1 (de) * 1985-12-31 1987-08-26 Akad Wissenschaften Ddr Zentrifugalwindsichter
FR2642994B1 (fr) * 1989-02-14 1991-10-11 Fives Cail Babcock Selecteur a air a action centrifuge
DE19606672A1 (de) * 1996-02-22 1997-08-28 Krupp Polysius Ag Sichter
DE59708938D1 (de) * 1996-10-18 2003-01-23 Hosokawa Alpine Ag & Co Vertikalachsiger Windsichter
CN104476085B (zh) * 2014-12-15 2016-02-17 江苏羚羊机械有限公司 一种选粉机大直径转子成型定位工装
US11406072B1 (en) * 2015-08-11 2022-08-09 Wesley Allen Bainter Apparatus for stabilizing irrigation towers
CN112718484B (zh) * 2021-01-28 2022-02-11 中国新型建材设计研究院有限公司 钢渣微粉的组合式高效选粉机及分选方法
CN115400857B (zh) * 2021-05-28 2024-06-21 湖州新开元碎石有限公司 一种用于机制砂石粉含量控制的调节装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2199015A (en) * 1937-12-15 1940-04-30 Comb Eng Co Inc Combined drier and separator
US2276761A (en) * 1937-02-15 1942-03-17 Ici Ltd Apparatus for the classification of material
US2338779A (en) * 1939-01-27 1944-01-11 Mutch Nathan Grading or separation of particles of solids, liquids, or gases

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT222989B (de) * 1960-08-06 1962-08-27 Alpine Ag Maschinenfabrik U Ei Strömungssichter
US3089595A (en) * 1960-08-06 1963-05-14 Alpine Ag Maschinenfabrik Und Flow apparatus for separating granular particles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2276761A (en) * 1937-02-15 1942-03-17 Ici Ltd Apparatus for the classification of material
US2199015A (en) * 1937-12-15 1940-04-30 Comb Eng Co Inc Combined drier and separator
US2338779A (en) * 1939-01-27 1944-01-11 Mutch Nathan Grading or separation of particles of solids, liquids, or gases

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498454A (en) * 1968-02-20 1970-03-03 Polaroid Corp Counter-current centrifugal device and use
US3651941A (en) * 1969-03-24 1972-03-28 Westinghouse Electric Corp Disc-centrifuge apparatus
US3670886A (en) * 1970-08-05 1972-06-20 Hosokawa Funtaikogaku Kenkyush Powder classifier
US3891543A (en) * 1971-02-03 1975-06-24 Josef Wessel Centrifugal sifter apparatus
CN102962120A (zh) * 2012-12-13 2013-03-13 吉林省电力有限公司电力科学研究院 电站锅炉回粉分离器
CN110237898A (zh) * 2019-05-08 2019-09-17 辉县市新科机械设备有限公司 真空粉碎机

Also Published As

Publication number Publication date
DE1782775A1 (de) 1972-03-30
GB1114314A (en) 1968-05-22
AT281566B (de) 1970-05-25
US3371783A (en) 1968-03-05
DE1507683A1 (de) 1972-02-10
DE1507683B2 (de) 1973-01-11
DE1782775B2 (de) 1974-07-18
DE1782775C3 (enrdf_load_html_response) 1975-03-13

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