US1963469A - Separator - Google Patents

Separator Download PDF

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Publication number
US1963469A
US1963469A US352799A US35279929A US1963469A US 1963469 A US1963469 A US 1963469A US 352799 A US352799 A US 352799A US 35279929 A US35279929 A US 35279929A US 1963469 A US1963469 A US 1963469A
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US
United States
Prior art keywords
chamber
sifting
ventilator
cylinder
conduit structure
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
US352799A
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English (en)
Inventor
Kuhr Albert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FIRM ALPINE AG
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FIRM ALPINE AG
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 FIRM ALPINE AG filed Critical FIRM ALPINE AG
Application granted granted Critical
Publication of US1963469A publication Critical patent/US1963469A/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
    • 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

Definitions

  • This invention relates to separators or sifters and has particular reference to improvements in such apparatus along the lines of increased efiiciency of operation, greater output, improved 5 quality of output, etc.
  • An important object of the invention relates to the separation'of pulverized material, for example, ground wheat into fine and coarse grades.
  • Two systems of separators or sifters are mainly known, in which the separation of the fine flour from the grits is effected by an air-current cir-' culating inside of the sifter.
  • the fan or ventilator occupies the highest position in the sifter-casing, i. e. being disposed above the sifting-chamber, aspirating the fine flour and blowing the same directly into the flour-chamber, while the grits drop from the sifting-chamber into the grits-hopper.
  • the ventilator is disposed below the spreading-plate and forces the material to be sifted upward within a comparatively high inner cylinder, whereby the coarser particles drop along the cylinder-wall into the grits-hopper, while the fine flours are conveyed over the upper edge of the internal cyl- 2 inder to the flour-chamber.
  • Both systems have considerable disadvantages for sifting to utmost fineness.
  • the distance between the spreading-plate and the ventilator must not be too great, in order to obtain a fair 3 capacity, as some part of the coarser flour is still sucked-up and forced into the flour-chamber, so
  • This separator is equipped above a lower sifting-chamber with a ventilator or fan structure, and an upper siftingand expansion-chamber, according to the present invention, is provided above the ventilator.
  • the fundamental feature 5 of the invention consists therefore of the disposition of the ventilator between a lower siftingchamber (preliminary sifting-chamber) and an upper siftingand expansion-chamber, wherein a subsequent sifting is effected by expansion of 5 the air containing the previously sifted material,
  • This extraordinary fa- 80 vorable effect is obtained by the generally advantageous design of the apparatus, by the location' of the fan, by the provision of the passage between the walls of the upper sifting-chamber and the walls of the expansion-chamber in which passage the air is moved downwardly so that the coarser particles separated above the fan are quickly conveyed to the grit hopper.
  • a separator according to the present invention, is illustrated in vertical section in the accompanying drawing by way of example.
  • the sifter is in usual manner fitted in an outer casing or cylinder m with a charging-aperture k, in which a shaft n with a spreading-plate 0 at its lower end is revolving.
  • This spreading-plate throws the material against a cone-shaped ballling-ring p, which has the purpose of loosening the material and deflect ing the same downwards.
  • the material to be sifted is aspirated through the pre- 10o liminary sifting-chamber q by a ventilator a having blades b disposed obliquely outward.
  • the coarser grits-particles drop along the wall of the cylinder 1 surrounding the ventilator and downinto the grits-hopper e.
  • the ventilator a, b producing a circulating air-current 'in the sense of the drawn arrows, blows the sifted material not directly into the flour-chamber h, but into 11 an upper sifting-chamber 0 above the ventilator.
  • This chamber is formed thereby, that the cylinder 2', surrounding the ventilator a, b, ends with its obliquely inward directed wall a considerable height 1 above the ventilator a, b.
  • the cylinder i has a wall s extending inwardly therefrom, this wall 3 dividing the conduit structure into upper and lower chambers.
  • the ventilator or fan structure a 1) also divides the conduit structure into upper and lower chambers.
  • an outer, concentric disposed cylinder g projects upwards to a considerable extent.
  • I defines substantially the height of the upper sifting-chamber 0 while the distance fl defines substantially the height of an expansionchamber 01.
  • cl further sifting of the already fine flour aspirated by the ventilator is effected by expansion of the air, whereby the coarser particles are separated from the finest.
  • An annular space d is provided in this manner between the two cylinders g and i.
  • a suction effect or downward movement of air is created, during operation, in this annular space at whereby coarse particles, which are blown outwardly up and against the inner tapering wall of the cylinder i, are drawn quickly down into the grit hopper e.
  • the present invention is concerned with a very emcient sifter in which double sifting is efiected, i. e., a preliminary sifting below the ventilator, and further sifting beyond the ventilator, due to the very advantageous location of the ventilator and its employment as an aspirating device (for the preliminary sifting) and as a blowing device (for the subsequent sifting).
  • a very emcient sifter in which double sifting is efiected, i. e., a preliminary sifting below the ventilator, and further sifting beyond the ventilator, due to the very advantageous location of the ventilator and its employment as an aspirating device (for the preliminary sifting) and as a blowing device (for the subsequent sifting).
  • an outer casing a substantially vertical open-ended conduit structure, means in said conduit structure for loosening and for distributing the material inserted therein, means for dividing said conduit structure into upper and lower chambers, and a fan structure above and adjacent said last-named means for creating suction eifectlve in the lower chamber and radially circulating pressure efiective in the upper chamber, the upper part of said conduit structure being substantially free from obstruction to define a free sifting chamber disposed above said fan structure, said fan structure caus ing the finer material to pass upwardly through said sifting chamber, then outwardly over the upper open end of said conduit structure, and then downwardly on the exterior of said conduit structure.
  • an outer casing a substantially vertical open-ended conduit structure, means in said conduit structure for loosening and for distributing the material inserted therein, means for dividing said conduit structure into upper and lower chambers, bafiie means associated with said dividing means and extending into said lower chamber, and a fan structure above and adjacent said dividing means for creating suction effective in the lower chamber and radially circulating pressure effective in the upper chamber, the upper part of said conduit structure being substantially free from obstruction to define a free sifting chamber disposed above said fan structure, said fan structure causing the finer material to pass upwardly through said sifting chamber, then outwardly over the upper open end of said conduit structure, and then downwardly on the exterior of said conduit structure.
  • an outer casing a substantially vertical open-ended conduit structure, said conduit structure comprising inner and outer conduits disposed substantially coaxially to form an annular space and the upper end of the inner conduit terminating below the upper end of the outer conduit, means comprising a fan structure disposed below the upper end of said inner conduit for dividing said conduit structure into serially related and coaxially disposed upper and lower chambers, the upper part of said conduit structure being substantially free from obstruction to define a free sifting chamber disposed above said fan structure, and means in the lower chamber for loosening and for distributing the material inserted therein, said fan structure creating suction efiective in the lower chamber and radially circulating pressure eifective in the upper chamber, said fan. structure causing the finer material to pass upwardly through said upper chamber, then outwardly over the upper open end of said conduit structure, and then downwardly on the exterior of said conduit structure.

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  • Combined Means For Separation Of Solids (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
US352799A 1928-04-07 1929-04-05 Separator Expired - Lifetime US1963469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE671529X 1928-04-07

Publications (1)

Publication Number Publication Date
US1963469A true US1963469A (en) 1934-06-19

Family

ID=6590555

Family Applications (1)

Application Number Title Priority Date Filing Date
US352799A Expired - Lifetime US1963469A (en) 1928-04-07 1929-04-05 Separator

Country Status (4)

Country Link
US (1) US1963469A (de)
AT (1) AT116103B (de)
FR (1) FR671529A (de)
GB (1) GB309378A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561564A (en) * 1948-08-23 1951-07-24 Comb Eng Superheater Inc Pulverizing mill separator, having whizzer and directional vanes
US4653699A (en) * 1984-02-04 1987-03-31 Evt Engergie-Und Verfahrensteckhnik Gmbh Coal-mill classifier
US5819947A (en) * 1996-01-29 1998-10-13 Sure Alloy Steel Corporation Classifier cage for rotating mill pulverizers
US5873156A (en) * 1993-10-13 1999-02-23 Sure Alloy Steel Corporation Coal pulverizer and method of improving flow therein
CN104492707A (zh) * 2014-11-27 2015-04-08 山东省农作物种质资源中心 一种瓜类种子分选装置及其使用方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112275350A (zh) * 2020-10-27 2021-01-29 宿州市超王面业有限责任公司 一种面粉生产加工用除杂装置及除杂方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561564A (en) * 1948-08-23 1951-07-24 Comb Eng Superheater Inc Pulverizing mill separator, having whizzer and directional vanes
US4653699A (en) * 1984-02-04 1987-03-31 Evt Engergie-Und Verfahrensteckhnik Gmbh Coal-mill classifier
US5873156A (en) * 1993-10-13 1999-02-23 Sure Alloy Steel Corporation Coal pulverizer and method of improving flow therein
US5819947A (en) * 1996-01-29 1998-10-13 Sure Alloy Steel Corporation Classifier cage for rotating mill pulverizers
CN104492707A (zh) * 2014-11-27 2015-04-08 山东省农作物种质资源中心 一种瓜类种子分选装置及其使用方法

Also Published As

Publication number Publication date
AT116103B (de) 1930-02-10
GB309378A (en) 1930-05-01
FR671529A (fr) 1929-12-13

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