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EP0301217B1 - Dispositif pour séparer des particules de tabac d'un mélange gaz/tabac - Google Patents

Dispositif pour séparer des particules de tabac d'un mélange gaz/tabac Download PDF

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Publication number
EP0301217B1
EP0301217B1 EP88109550A EP88109550A EP0301217B1 EP 0301217 B1 EP0301217 B1 EP 0301217B1 EP 88109550 A EP88109550 A EP 88109550A EP 88109550 A EP88109550 A EP 88109550A EP 0301217 B1 EP0301217 B1 EP 0301217B1
Authority
EP
European Patent Office
Prior art keywords
hood
separator according
deflection chamber
tobacco
gas
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
EP88109550A
Other languages
German (de)
English (en)
Other versions
EP0301217A2 (fr
EP0301217A3 (en
Inventor
Werner Dipl. Ing. Hirsch
Arno Dipl. Ing. Weiss
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 Germany GmbH
Original Assignee
BAT Cigarettenfabriken 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 BAT Cigarettenfabriken GmbH filed Critical BAT Cigarettenfabriken GmbH
Priority to DK377088A priority Critical patent/DK172024B1/da
Priority to CA000572671A priority patent/CA1300042C/fr
Priority to FI883548A priority patent/FI90005C/fi
Priority to AU20185/88A priority patent/AU600845B2/en
Priority to MYPI88000861A priority patent/MY103137A/en
Publication of EP0301217A2 publication Critical patent/EP0301217A2/fr
Publication of EP0301217A3 publication Critical patent/EP0301217A3/de
Application granted granted Critical
Publication of EP0301217B1 publication Critical patent/EP0301217B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B07B7/02—Selective separation of solid materials carried by, or dispersed in, gas currents by reversal of direction of flow
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B1/00—Preparation of tobacco on the plantation
    • A24B1/04—Sifting, sorting, cleaning or removing impurities from tobacco
    • 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 invention relates to a separator for separating tobacco particles from a tobacco / gas mixture of the type specified in the preamble of claim 1 and in the preamble of claim 13.
  • DE-OS 36 19 816 shows a device for expanding tobacco which, in addition to a cyclone dust separator, contains a separator with a mesh screen.
  • the mesh screen allows the vapor / air mixture to pass to an outlet pipe which it returns to the circuit while the tobacco particles are directed down to an airlock.
  • EP-A-0 029 588 discloses a process for heating tobacco which is impregnated with an expansion agent, in which the gas containing expanded tobacco is separated from the tobacco particles by means of a tangential separator.
  • a separator of the type specified for separating dust particles from a gas is apparent from DE-PS 639 871.
  • an annular channel is connected to the inlet, from the underside of which several, wreath-like channels in helical windings lead in the same direction as the raw gas supply line downwards and open into a chamber below the annular channel in a continuous transition to the chamber wall; the radius of curvature of these channels is smaller than half the diameter of the hood.
  • centrifugal separator in which the mixture flows have to be transported at a relatively high speed in order to produce the desired separation due to the change in movement when passing through the curved channels.
  • the disadvantage here is the relatively large amount of equipment required for the required high transport speed both in the inlet and in the deflection space and finally in the hood;
  • the lower end of the hood must be kept closed, for example by means of a cellular wheel sluice, in order to ensure the required high conveying speeds.
  • an open outlet can or must be used.
  • the invention is therefore based on the object of providing a separator of the type specified, in which the disadvantages mentioned above do not occur.
  • a separator which enables the gas / tobacco particles to be separated properly in a structurally simple manner with relatively low conveying speeds.
  • the horizontal flow cross section of the hood must be chosen so large that the vertical flow rate of the gas phase is always lower than the sinking rate of the tobacco particles to be separated, i.e. the overall system must take into account the highest expected gas flow on the one hand and the lowest expected sinking rate of the On the other hand, tobacco particles can be designed.
  • the size ratio of the area of the deflection space to the area of the inlet must be in the range from 5 to 30; at the same time the size ratio of the area of the hood to the area of the inlet must be greater than 50, in particular greater than 100.
  • the usual speeds required for the pneumatic transport of the tobacco / gas mixture occur in the range of approximately 20 m / s, while the gas outlet speeds at the upper end of the hood range from approximately 0.1 to 0.2 m / s.
  • the hood can be opened downwards, i.e. the separator can be operated without a discharge element which is susceptible to malfunction, in particular contamination.
  • a discharge element generally a cellular wheel sluice or a discharge screw.
  • the degree of separation improves with decreasing gas phase, since in this case the difference between the vertical flow rate of the gas phase and the sinking rate of the tobacco particles increases.
  • a flow resistance is arranged in the upper area of the hood, which usually consists of a perforated plate with holes evenly distributed over the perforated plate surface.
  • a sieve or filter can be arranged below the flow resistance; as an alternative to this, it is also possible to design the flow resistance itself as a sieve or filter.
  • an opening which can be closed by a door and which allows access to the interior of the hood or the deflection space can be provided in the hood and / or the deflection space.
  • the wall of the hood is provided with a heater in order to prevent condensation and the resulting contamination of the walls.
  • the separator shown in FIGS. 1 and 2, generally indicated by reference number 10, has a vertically arranged hood 12 which is open at the bottom and has a regular cross section; As can be seen from FIG. 2, this cross section is generally rectangular, in particular square, or circular, as indicated by the dash-dotted lines.
  • the door 24 is used for easy inspection and cleaning of the separator 10.
  • the hood of the separator 10 is provided with an outlet funnel 14 with an outlet opening 16 which has a smaller cross section than the hood 12.
  • a fan (not shown) is connected to the outlet opening 16.
  • hood 12 there is a vertically arranged, downwardly open, round deflection space 20, to which, via a transport line 22, generally a transport pipe, the two-phase mixture to be separated is fed, ie the mixture of tobacco / gas.
  • a transport line 22 generally a transport pipe
  • the direction of transport is indicated by the large arrow, while the flows of the two phases of the tobacco / gas mixture in line 12 are indicated by the two different arrows.
  • the transport line 22 opens tangentially into the deflection space 20 has a circular cross section and is usually designed as a vertically arranged cylinder which is closed at the top and open at the bottom.
  • the tobacco / gas mixture arriving from line 22 lies tangentially against the inner wall of the deflection space 20 and is supplied on a spiral path along the inner wall of the deflection space 20 while simultaneously braking the lower opening of the deflection space 20.
  • the tobacco particles fall down, as indicated by the arrows, while the lighter phase, namely gas, is sucked up by the fan and exits from the outlet opening 16 of the hood 12.
  • a flow resistance 18 is arranged in the upper area of the hood, i.e. somewhat below the funnel 14, but above the deflection space 20, which consists of a perforated plate with holes evenly distributed over its surface.
  • the hood 12 can be open at the bottom, as can be seen from FIG. In this case, the separator 10 can be operated without a discharge element for the separated tobacco particles that is susceptible to malfunction, in particular contamination.
  • this discharge element is formed by a cellular wheel sluice 28 or also by a screw conveyor, which is located in the outlet opening in the funnel-shaped, lower region 26 of the hood 12.
  • the embodiment according to FIG. 3 also differs from the embodiment according to FIGS. 1 and 2 by an additionally provided sieve 30; this sieve 30 is in the hood 12 between the Deflection chamber 20 and the flow resistance 18 arranged and prevents the entrainment of tobacco particles in the suction line connected to the outlet 16.
  • the horizontal flow cross section of the hood 12 must be chosen so large that the vertical flow rate of the gas phase is always lower than the sinking rate of the tobacco particles to be separated, i.e. the separator 10 must be designed taking into account the highest expected gas flow on the one hand and the lowest expected sink rate of the tobacco particles on the other.
  • FIG. 4 shows an embodiment of a separator 10 which can be used when the gas phase consists of steam or contains condensing components.
  • the walls of the hood 12 should be provided with a heater in order to prevent condensation and the resulting contamination of the walls.
  • the heating in the wall of the hood 12 is indicated by the zigzag line.
  • the gas phase consisting of steam or containing condensing components is drawn off to the left as shown in FIG. 4 and fed to an outlet connection 32 which is inclined somewhat downward in relation to the horizontal in the outflow direction, so that it is inclined the condensate formed there collects at the bottom of the outlet connection 32 and can be discharged via a line 34.
  • this embodiment has the structure already described, so that it does not have to be described again.
  • FIG. 5a shows different embodiments of the deflection space.
  • the cylindrical deflection space 20 is provided with a closed, pointed roof 38, so that no tobacco particles or contaminants can be deposited on the deflection space.
  • FIGS. 5b and 5c finally show embodiments of deflection spaces 20 which are open at the top.
  • FIG. 5b shows an embodiment in which a funnel-shaped area 40 adjoins the cylindrical deflection space 20, which is provided with a cleaning opening at its upper end, so that the interior of the deflection space 20 is freely accessible, in particular for cleaning purposes.
  • FIG. 5c shows an embodiment of the deflection space which has side walls 42 which run obliquely inwards over its entire height and which is likewise provided with a cleaning opening 44 at its upper end. The result is a smooth inner wall of the deflection space 42, so that the deposition of tobacco particles or impurities is largely excluded.
  • FIGS. 6 and 7 show an embodiment of a separator which differs from the previously discussed embodiments in that two deflection spaces 20 are arranged vertically next to one another in the hood 12. Each deflection space 20 is provided with an associated transport line 22 for supplying the tobacco / gas mixture.
  • FIG. 8 finally shows an embodiment of the separator 10 corresponding to FIGS. 1 and 2, but with a deflection space 20 corresponding to FIG. 5b.
  • 1,500 kg of tobacco per hour were fed with a gas or steam mass flow of 500 kg / hour. processed.
  • the inlet speed of the tobacco / gas mixture was in the order of magnitude of about 20 m / s required for the pneumatic transport.
  • the speed of the gas drawn off was between 0.1 and 0.2 m / s, for which purpose a vacuum of 5 mbar was maintained in the upper, funnel-shaped end region of the hood 12.

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  • Agronomy & Crop Science (AREA)
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Claims (18)

  1. Séparateur de particules de tabac convoyées dans un mélange tabac/gaz, comportant :
    a) une hotte (12),
    b) une chambre de déviation (20) ronde, disposée dans la hotte (12),
    c) une entrée (22) pour le mélange tabac/gaz à séparer, débouchant tangentiellement dans la chambre de déviation (20) ronde,
    d) une sortie, dirigée vers le bas, pour les particules de tabac, dans la chambre de déviation (20),
    e) une sortie pour les particules de tabac à l'extrémité inférieure de la hotte (12), et
    f) une sortie (16) pour le gaz, au-dessus de la chambre de déviation (20),
    g) le gaz étant aspiré hors de la hotte (12) au-dessus de la chambre de déviation (20),
       caractérisé par les éléments suivants :
    h) la chambre de déviation (20) est matérialisée par un cylindre (20) fermé vers le haut et ouvert vers le bas,
    i) le rapport de grandeur entre la surface (A₂) de la chambre de déviation (20) et la surface (A₁) de l'entrée (22) se situe entre 5 et 30; et
    j) le rapport de grandeur entre la surface (A₃) de la hotte (12) et la surface (A₁) de l'entrée (22) est supérieur à 50.
  2. Séparateur suivant la revendication 1, caractérisé en ce que le rapport de grandeur entre la surface (A₃) de la hotte (12) et la surface (A₁) de l'entrée (22) est supérieur à 100, mais inférieur à 200.
  3. Séparateur suivant l'une des revendications 1 ou 2, caractérisé en ce que le rapport de grandeur entre la surface (A₂) de la chambre de déviation (20) et la surface (A₁) de l'entrée (22) se situe entre 10 et 20.
  4. Séparateur suivant l'une des revendications 1 à 3, caractérisé en ce que plusieurs chambres de déviation (20) avec des entrées (22) correspondantes sont disposées à l'intérieur d'une hotte (12).
  5. Séparateur suivant l'une des revendications 1 à 4, caractérisé en ce que l'extrémité inférieure de la hotte (12) est ouverte.
  6. Séparateur suivant l'une des revendications 1 à 4, caractérisé en ce qu'un organe de décharge (28) est intégré dans l'extrémité inférieure de la hotte (12).
  7. Séparateur suivant la revendication 6, caractérisé en ce qu'une vis sans fin ou une écluse rotative (28) est prévue comme organe de décharge.
  8. Séparateur suivant l'une des revendications 1 à 7, caractérisé en ce qu'une résistance à l'écoulement (18) est prévue en partie haute de la hotte (12).
  9. Séparateur suivant la revendication 8, caractérisé en ce que la résistance à l'écoulement (18) est matérialisée par une tôle perforée pourvue de perforations régulièrement réparties sur sa surface.
  10. Séparateur suivant l'une des revendications 1 à 9, caractérisé en ce qu'un tamis (30) est disposé en partie haute de la hotte (12).
  11. Séparateur suivant l'une des revendications 1 à 10, caractérisé en ce qu'un dispositif chauffant est placé dans la paroi de la hotte (12).
  12. Séparateur suivant l'une des revendications 1 à 11, caractérisé en ce que la chambre de déviation (20) est pourvue d'un toit en pointe (38).
  13. Séparateur de particules de tabac convoyées dans un mélange tabac/gaz, comportant :
    a) une hotte (12),
    b) une chambre de déviation (20) ronde, disposée dans la hotte (12),
    c) une entrée (22) pour le mélange tabac/gaz à séparer, débouchant tangentiellement dans la chambre de déviation (20) ronde,
    d) une sortie, dirigée vers le bas, pour les particules de tabac, dans la chambre de déviation (20),
    e) une sortie pour les particules de tabac à l'extrémité inférieure de la hotte (12), et
    f) une sortie (16) pour le gaz, au-dessus de la chambre de déviation (20),
    g) le gaz étant aspiré hors de la hotte (12) au-dessus de la chambre de déviation (20), caractérisé par les éléments suivants :
    h) la chambre de déviation (20) présente la forme d'un cylindre (20) ouvert en direction du bas;
    i) la chambre de déviation (20) est pourvue, à son extrémité supérieure, d'un cône (40) ouvert vers le haut;
    j) le rapport de grandeur entre la surface (A₂) de la chambre de déviation (20) et la surface (A₁) de l'entrée (22) se situe entre 5 et 30; et
    k) le rapport de grandeur entre la surface (A₃) de la hotte (12) et la surface (A₁) de l'entrée (22) est supérieur à 50.
  14. Séparateur suivant la revendication 13, caractérisé en ce que la chambre de déviation (20) a la forme d'un cône (42) pourvu d'une ouverture (44) à son extrémité supérieure.
  15. Séparateur suivant l'une des revendications 1 à 14, caractérisé en ce qu'une tubulure de sortie (32) inclinée d'oblique vers le bas par rapport à l'horizontale, est raccordée à l'extrémité supérieure de la hotte (12).
  16. Séparateur suivant l'une des revendications 1 à 15, caractérisé en ce que la hotte (12) présente une section transversale régulière.
  17. Séparateur suivant la revendication 16, caractérisé en ce que la hotte (12) présente une section transversale circulaire.
  18. Séparateur suivant la revendication 16, caractérisé en ce que la hotte (12) présente une section rectangulaire, en particulier carrée.
EP88109550A 1987-07-29 1988-06-15 Dispositif pour séparer des particules de tabac d'un mélange gaz/tabac Expired - Lifetime EP0301217B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DK377088A DK172024B1 (da) 1987-07-29 1988-07-07 Separator til adskillelse af små tobaksstykker fra en tobak/gasblanding
CA000572671A CA1300042C (fr) 1987-07-29 1988-07-21 Instrument permettant de separer les particules de tabac a partir d'un melangetabac-gaz
FI883548A FI90005C (fi) 1987-07-29 1988-07-28 Avskiljare foer avskiljande av tobaksbestaondsdelar fraon en tobaks/gasblandning
AU20185/88A AU600845B2 (en) 1987-07-29 1988-07-29 Separator for separating tobacco particles from a tobacco/gas mixture
MYPI88000861A MY103137A (en) 1987-07-29 1988-07-29 Separator for separating tobacco particles from a tobacco/gas mixture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3725148 1987-07-29
DE3725148 1987-07-29

Publications (3)

Publication Number Publication Date
EP0301217A2 EP0301217A2 (fr) 1989-02-01
EP0301217A3 EP0301217A3 (en) 1989-12-06
EP0301217B1 true EP0301217B1 (fr) 1993-02-03

Family

ID=6332642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109550A Expired - Lifetime EP0301217B1 (fr) 1987-07-29 1988-06-15 Dispositif pour séparer des particules de tabac d'un mélange gaz/tabac

Country Status (4)

Country Link
US (1) US4938235A (fr)
EP (1) EP0301217B1 (fr)
DE (1) DE3878072D1 (fr)
HK (1) HK25794A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5813413A (en) * 1995-11-20 1998-09-29 Brown & Williamson Tobacco Corporation Method and plant for treating tobacco leaves for the production of cut tobacco

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
CH683226A5 (de) * 1991-12-09 1994-02-15 Egri Laszlo Expandieren und Trocknen von Tabak.
US5582193A (en) * 1994-08-24 1996-12-10 Philip Morris Incorporated Method and apparatus for expanding tobacco
AT403133B (de) * 1996-03-14 1997-11-25 Scheuch Alois Gmbh Sichter
US5826590A (en) * 1996-09-26 1998-10-27 Brown & Williamson Tobacco Corp. Method and plant for treating tobacco stems for the production of cut tobacco
US6371126B1 (en) * 2000-03-03 2002-04-16 Brown & Williamson Tobacco Corporation Tobacco recovery system
CA2499853C (fr) * 2004-03-15 2012-11-13 Universal Leaf Tobacco Company, Inc. Appareil et methode de balayage et de tri de feuilles de tabac
DE102005062090B4 (de) * 2005-12-22 2010-01-14 Hauni Maschinenbau Ag Sichtvorrichtung und Verfahren zum Trennen von schweren und leichten Partikeln von Tabakmaterial
ATE467592T1 (de) * 2007-10-02 2010-05-15 Klaus Wilhelm Druckluftförderanlage für schüttgut
US8281931B2 (en) * 2009-09-18 2012-10-09 Key Technology, Inc. Apparatus and method for post-threshing inspection and sorting of tobacco lamina
CN104705778B (zh) * 2015-01-19 2016-06-29 河南中烟工业有限责任公司 一种烟草流动萃取装置
CN106617259A (zh) * 2017-02-22 2017-05-10 广东中烟工业有限责任公司 一种负压管道除尘阻火装置
CN111358034A (zh) * 2020-03-31 2020-07-03 佛山市高明曦逻科技有限公司 一种烟叶烤房回收装置以及使用方法

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE639871C (de) * 1936-12-15 Heinrich Junkmann Dipl Ing Fliehkraftstaubabscheider
CA1136514A (fr) * 1979-07-10 1982-11-30 Rothmans Of Pall Mall Canada Limited Alimentateur-doseur de tabac
US4366825A (en) * 1979-11-21 1983-01-04 Philip Morris Incorporated Expansion of tobacco
US4407306A (en) * 1981-12-17 1983-10-04 American Brands, Inc. Method for expanding tobacco with steam at high temperature and velocity
DE3416701A1 (de) * 1983-05-19 1984-11-22 Hauni-Werke Körber & Co KG, 2050 Hamburg Einrichtung zum beschicken tabakverarbeitender strangmaschinen
DE3409814A1 (de) * 1984-03-16 1985-09-19 Waeschle Maschinenfabrik Gmbh, 7980 Ravensburg Gegenstromsichter
GB8515217D0 (en) * 1985-06-15 1985-07-17 British American Tobacco Co Treatment of tobacco
JPS62183888A (ja) * 1986-01-13 1987-08-12 株式会社日本アルミ フロス分離装置
DE3710677A1 (de) * 1987-03-31 1988-10-13 Bat Cigarettenfab Gmbh Vorrichtung zum expandieren von zerkleinertem tabakmaterial

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5813413A (en) * 1995-11-20 1998-09-29 Brown & Williamson Tobacco Corporation Method and plant for treating tobacco leaves for the production of cut tobacco
DE19543263C2 (de) * 1995-11-20 2001-04-19 Bat Cigarettenfab Gmbh Verfahren und Anlage zur Behandlung von Tabakblättern für die Herstellung von Schnittabak

Also Published As

Publication number Publication date
US4938235A (en) 1990-07-03
EP0301217A2 (fr) 1989-02-01
DE3878072D1 (de) 1993-03-18
EP0301217A3 (en) 1989-12-06
HK25794A (en) 1994-03-31

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