GB1135913A - Method and apparatus for pneumatically sifting loose material - Google Patents

Method and apparatus for pneumatically sifting loose material

Info

Publication number
GB1135913A
GB1135913A GB820967A GB820967A GB1135913A GB 1135913 A GB1135913 A GB 1135913A GB 820967 A GB820967 A GB 820967A GB 820967 A GB820967 A GB 820967A GB 1135913 A GB1135913 A GB 1135913A
Authority
GB
United Kingdom
Prior art keywords
region
sifting
baffle
air
housing
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
Application number
GB820967A
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.)
Miag Muehlenbau und Industrie GmbH
Original Assignee
Miag Muehlenbau und Industrie GmbH
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 Miag Muehlenbau und Industrie GmbH filed Critical Miag Muehlenbau und Industrie GmbH
Publication of GB1135913A publication Critical patent/GB1135913A/en
Expired legal-status Critical Current

Links

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
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/01—Selective separation of solid materials carried by, or dispersed in, gas currents using gravity
    • 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
    • B07B7/02—Selective separation of solid materials carried by, or dispersed in, gas currents by reversal of direction of flow

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

1,135,913. Pneumatic sifting. MIAG MUHLENBAU UND INDUSTRIE G.m.b.H. 21 Feb.. 1967 [23 Feb., 1966], No. 8209/67. Heading B2H. In an apparatus for pneumatic sifting of loose material, e.g. for the separation and cleaning of grain crops, the material is caused to drop in a veil-like manner in a main coarse fraction sifting region against upward flowing sifting air which is subjected, before entering the main sifting region, to a pressure drop and, after leaving the region, to a pressure increase and a subsequent continuous acceleration and, finally, to a deflection and a subsequent expansion whereby a medium fraction is separated out. The apparatus comprises a cylindrical housing 1 to the bottom of which material entrained in sifting air is fed through an axially adjustable pipe 3 having a flared end 23. A baffle 4 mounted above the pipe 3 has a passage 5 through which the material is projected into a chamber 6 formed in the lower part of a frusto-conical insert member 11 in the upper part of which is provided an expansion chamber 12. A conical baffle 22 in the chamber 6 assists in deflecting the upward moving material downwards on to the upper surface 7 of the baffle 4 which is provided with a step 21 for uniform distribution of the material. The main sifting region 8 is formed by the annular space between the baffle 4 and the housing 1 and a resifting region 10 is defined by the longitudinally tapered annular space between the member 11 and the housing 1. The space 20 between the flared pipe portion 23 and the baffle 4 provides a nozzle causing a pressure drop in the air before it enters the region 8. The diameter of the lower end of the member 11 is smaller than that of the baffle 4 in the region 8 so that as the air enters the region 10 it slows down and its pressure increases. On leaving the region 10 the air is sharply deflected by means of a baffle ring 18 into the expansion chamber 12 where a medium fraction separates out. The air and the fine fraction flow via a hood 15 and a pipe 16 of adjustable flow cross-sectional area to a separator for recovery of the fine fraction. In modification, the material may be fed from above on to the surface of the baffle 4 and the sifting air blown or induced from below through apertures in the housing.
GB820967A 1966-02-23 1967-02-21 Method and apparatus for pneumatically sifting loose material Expired GB1135913A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0068493 1966-02-23

Publications (1)

Publication Number Publication Date
GB1135913A true GB1135913A (en) 1968-12-11

Family

ID=7312632

Family Applications (1)

Application Number Title Priority Date Filing Date
GB820967A Expired GB1135913A (en) 1966-02-23 1967-02-21 Method and apparatus for pneumatically sifting loose material

Country Status (7)

Country Link
BE (1) BE692736A (en)
CH (1) CH446864A (en)
DE (1) DE1507715C3 (en)
DK (1) DK115442B (en)
FR (1) FR1508720A (en)
GB (1) GB1135913A (en)
SE (1) SE304160B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520640A1 (en) * 1982-02-01 1983-08-05 Waeschle Maschf Gmbh CURRENT INVERTER DUST COLLECTOR
WO2003037534A1 (en) * 2001-10-30 2003-05-08 Industrial Metal Fabricators (Chatham) Ltd. Method apparatus for separating unwanted matter from granular material
CN102600954A (en) * 2012-03-24 2012-07-25 华电电力科学研究院 Double volute type coal dust separator
CN102962120A (en) * 2012-12-13 2013-03-13 吉林省电力有限公司电力科学研究院 Powder recovery separator of power station boiler
CN107670982A (en) * 2016-08-02 2018-02-09 徐州绿之源环境科技有限公司 Building waste wind-force separator
CN108253400A (en) * 2018-01-29 2018-07-06 湖南湘讯企业管理有限公司 A kind of hot wind water conservancy diversion station boiler

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD249646A1 (en) * 1986-06-04 1987-09-16 Nagema Veb K AIR SEPARATOR
CN111282815B (en) * 2018-12-07 2022-01-04 中国石油化工股份有限公司 Solid particle size controller, application thereof and method for separating solid particles
CN110743790B (en) * 2019-10-25 2020-10-27 安徽金寨乔康药业有限公司 Ganoderma lucidum spore powder airflow grading equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520640A1 (en) * 1982-02-01 1983-08-05 Waeschle Maschf Gmbh CURRENT INVERTER DUST COLLECTOR
WO2003037534A1 (en) * 2001-10-30 2003-05-08 Industrial Metal Fabricators (Chatham) Ltd. Method apparatus for separating unwanted matter from granular material
US6712216B2 (en) 2001-10-30 2004-03-30 Frank Van Oirschot Method apparatus for separating unwanted matter from granular material
CN102600954A (en) * 2012-03-24 2012-07-25 华电电力科学研究院 Double volute type coal dust separator
CN102962120A (en) * 2012-12-13 2013-03-13 吉林省电力有限公司电力科学研究院 Powder recovery separator of power station boiler
CN107670982A (en) * 2016-08-02 2018-02-09 徐州绿之源环境科技有限公司 Building waste wind-force separator
CN108253400A (en) * 2018-01-29 2018-07-06 湖南湘讯企业管理有限公司 A kind of hot wind water conservancy diversion station boiler

Also Published As

Publication number Publication date
BE692736A (en) 1967-07-03
DE1507715B2 (en) 1973-09-13
DE1507715A1 (en) 1969-04-03
DK115442B (en) 1969-10-06
FR1508720A (en) 1968-01-05
SE304160B (en) 1968-09-16
DE1507715C3 (en) 1974-06-27
CH446864A (en) 1967-11-15

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