GB1390686A - Process and apparatus for separating sand from botanical materials - Google Patents

Process and apparatus for separating sand from botanical materials

Info

Publication number
GB1390686A
GB1390686A GB5900572A GB5900572A GB1390686A GB 1390686 A GB1390686 A GB 1390686A GB 5900572 A GB5900572 A GB 5900572A GB 5900572 A GB5900572 A GB 5900572A GB 1390686 A GB1390686 A GB 1390686A
Authority
GB
United Kingdom
Prior art keywords
column
support
sand
mixture
air
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
GB5900572A
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.)
British American Tobacco Investments Ltd
Original Assignee
British American Tobacco Co Ltd
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 British American Tobacco Co Ltd filed Critical British American Tobacco Co Ltd
Publication of GB1390686A publication Critical patent/GB1390686A/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
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B4/00—Separating by pneumatic tables or by pneumatic jigs
    • B03B4/005—Separating by pneumatic tables or by pneumatic jigs the currents being pulsating, e.g. pneumatic jigs; combination of continuous and pulsating currents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B4/00—Separating by pneumatic tables or by pneumatic jigs
    • B03B4/02—Separating by pneumatic tables or by pneumatic jigs using swinging or shaking tables

Abstract

1390686 Fluidized-bed separation BRITISHAMERICAN TOBACCO CO Ltd 21 Dec 1972 [21 March 1972] 59005/72 Heading B2H A process for separating sand from botanical material, e.g. tobacco or tea, comprises feeding a mixture of the sand and botanical material to a fluidized-bed column 1 above a support 14, providing a flow of gas, e.g. air, upwardly through the column, conveying the botanical portion of the mixture through the upper portion of the column, and causing the sand to filter to the bottom of the column through the support. The mixture is fed to the column 1 from a hopper 3 via a chute 5, which may be vibratory and may contain a screen 6 for preliminary separation, a hopper 4 and a screw conveyor 2. The column 1 is provided with flexible supports 10, 11 and means 12 for vibrating it. The support 14 includes two wire mesh screens 15, 16 between which are closely packed particles in the form of spherical bodies, which may be made of steel, glass, ceramic or thermo-setting resin. The mixture is maintained in a fluidized state in section 13 of the column by blowing air upwardly through the support 14 or, as shown, by sucking it through by means of a vacuum pump associated with a cyclone separator 31 in which the botanical material entrained with the air is separated therefrom. A control means 21 actuates valves 22, 23 to maintain a steady air flow and, at desired intervals, to superimpose a pulsed flow. The sand which passes through the support 14 is collected in a receptacle 17. A baffle (40), Fig. 2 (not shown), may be provided in the upwardly tapering portion of the column to control air flow and prevent clogging.
GB5900572A 1972-03-21 1972-12-21 Process and apparatus for separating sand from botanical materials Expired GB1390686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00236693A US3842978A (en) 1972-03-21 1972-03-21 Process and apparatus for separating sand from botanical materials

Publications (1)

Publication Number Publication Date
GB1390686A true GB1390686A (en) 1975-04-16

Family

ID=22890563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5900572A Expired GB1390686A (en) 1972-03-21 1972-12-21 Process and apparatus for separating sand from botanical materials

Country Status (8)

Country Link
US (2) US3842978A (en)
AU (1) AU472451B2 (en)
BR (1) BR7208936D0 (en)
CA (1) CA962973A (en)
DE (1) DE2313847C3 (en)
FR (1) FR2176959B1 (en)
GB (1) GB1390686A (en)
ZA (1) ZA731781B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU502399B2 (en) * 1975-10-20 1979-07-26 Brown & Williamson Tobacco Corporation Separating particulate material
DE2654593C3 (en) * 1976-12-02 1980-08-07 Damin Mineralien Gmbh, 4630 Bochum Typesetting machine
US4216080A (en) * 1979-01-29 1980-08-05 Brown & Williamson Tobacco Corporation Method and apparatus for separating sand from botanical fines
US4280903A (en) * 1980-08-06 1981-07-28 Brown & Williamson Tobacco Corporation Apparatus for separating sand from botanical fines
US4646759A (en) * 1984-01-06 1987-03-03 Philip Morris Incorporated Vibrating trough tobacco separator and classifier
WO1990010506A1 (en) * 1989-02-27 1990-09-20 Stripping Technologies Inc. Particle separation and classification mechanism
US5048693A (en) * 1989-06-28 1991-09-17 World Agrosearch, Ltd. Method and apparatus for sorting articles with small density differences utilizing a flotation stream
US5118409A (en) * 1989-06-28 1992-06-02 Sddm, Inc. Apparatus and method for improving density uniformity of a fluidized bed medium, and/or for improving material fluidized bed sorting
US5122262A (en) * 1990-01-12 1992-06-16 Summers Thomas W Separator screen with intermittent vacuum
US5263589A (en) * 1992-09-18 1993-11-23 Philip Morris Incorporated Method of recovering tobacco from stemmery discard
US5411142A (en) * 1993-03-29 1995-05-02 Abbott; Kenneth E. Air-flow control for particle cleaning systems
US5351832A (en) * 1993-03-29 1994-10-04 Stripping Technologies, Inc. Control system for cleaning systems
JPH10329136A (en) * 1997-05-28 1998-12-15 Kyowa Hakko Kogyo Co Ltd Method and apparatus for producing granules
AT513285B1 (en) * 2012-10-02 2014-03-15 Binder Co Ag Apparatus / method for classifying polydisperse feedstock
CN109717504B (en) * 2019-02-18 2023-09-05 云南中烟工业有限责任公司 Fluidized bed type pneumatic tobacco leaf sorting and cleaning device and tobacco leaf cleaning method thereof
CN112958449A (en) * 2021-01-25 2021-06-15 佛山市上霄云科技有限公司 Auxiliary device for efficiently screening and separating tea leaves and tea handles
WO2023087078A1 (en) * 2021-11-22 2023-05-25 New Amigos Pty Ltd Processes and apparatus for separating target material from particulate mixture

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068783A (en) * 1932-09-29 1937-01-26 Carl A Wendell Apparatus for separating materials
FR782279A (en) * 1934-12-04 1935-06-01 Prep Ind Combustibles Filter bed dry washing table
US2678131A (en) * 1950-07-17 1954-05-11 Robert F Dore Dry concentrator
US2683685A (en) * 1951-07-28 1954-07-13 Standard Oil Dev Co Elutriation of finely divided solids
US2857050A (en) * 1955-01-20 1958-10-21 Dorr Oliver Inc Hydraulic classifier
US3027652A (en) * 1958-01-20 1962-04-03 George W Wallace Methods and means for simultaneously cleaning and drying finely divided mineral matter such as coal and the like
US3164548A (en) * 1961-06-15 1965-01-05 Imp Tobacco Co Ltd Tower type pneumatic separator
GB1016872A (en) * 1961-07-14 1966-01-12 Defibrator Ab Improvements in and relating to production of chips from cellulose and similar materials
US3406824A (en) * 1966-11-14 1968-10-22 Arthur R. Forsberg Stone and heavy grain discharge outlet for gravity separators
GB1246406A (en) * 1968-01-24 1971-09-15 Metallgesellschaft Ag Method of and apparatus for separating coarse and/or heavy particles from a mixture of granular solids with differing particle sizes and/or differing particle weights
US3610415A (en) * 1969-05-01 1971-10-05 Frankel Co Inc Method of dry separation of less dense metal particles from more dense metal particles and apparatus therefore
US3596765A (en) * 1969-10-31 1971-08-03 Leonel L Beudin Density separation apparatus

Also Published As

Publication number Publication date
FR2176959A1 (en) 1973-11-02
USRE29625E (en) 1978-05-09
ZA731781B (en) 1973-12-19
FR2176959B1 (en) 1977-12-30
US3842978A (en) 1974-10-22
DE2313847A1 (en) 1973-10-04
AU5337873A (en) 1974-09-19
DE2313847B2 (en) 1977-10-27
AU472451B2 (en) 1976-05-27
CA962973A (en) 1975-02-18
DE2313847C3 (en) 1978-06-08
BR7208936D0 (en) 1973-12-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
PE20 Patent expired after termination of 20 years

Effective date: 19921219